diff --git a/doc/fixes35.0 b/doc/fixes35.0
index f1095ecde..b96003082 100644
--- a/doc/fixes35.0
+++ b/doc/fixes35.0
@@ -350,6 +350,9 @@ teleport control and polymorph control are ineffective while hero is stunned
 don't report "fried to a crisp" for disintegration from divine wrath
 spellcasting monsters' spell selection became less likely to choose harder
 	spells as their level got higher (including Wizard's "double trouble")
+Eye of the Aethiopica, Eyes of the Overworld, and Sceptre of Might must be
+	worn or wielded rather than just carried to convey magic resistance
+Mitre of Holiness and Tsurugi of Muramasa convey Protection when worn/wielded
 
 
 Platform- and/or Interface-Specific Fixes
diff --git a/include/artifact.h b/include/artifact.h
index a963840d5..0fbdc9a42 100644
--- a/include/artifact.h
+++ b/include/artifact.h
@@ -1,41 +1,40 @@
 /* NetHack 3.5	artifact.h	$Date$  $Revision$ */
-/*	SCCS Id: @(#)artifact.h 3.5	1995/05/31	*/
 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
 /* NetHack may be freely redistributed.  See license for details. */
 
 #ifndef ARTIFACT_H
 #define ARTIFACT_H
 
-#define SPFX_NONE   0x0000000L	/* no special effects, just a bonus */
-#define SPFX_NOGEN  0x0000001L	/* item is special, bequeathed by gods */
-#define SPFX_RESTR  0x0000002L	/* item is restricted - can't be named */
-#define SPFX_INTEL  0x0000004L	/* item is self-willed - intelligent */
-#define SPFX_SPEAK  0x0000008L	/* item can speak (not implemented) */
-#define SPFX_SEEK   0x0000010L	/* item helps you search for things */
-#define SPFX_WARN   0x0000020L	/* item warns you of danger */
-#define SPFX_ATTK   0x0000040L	/* item has a special attack (attk) */
-#define SPFX_DEFN   0x0000080L	/* item has a special defence (defn) */
-#define SPFX_DRLI   0x0000100L	/* drains a level from monsters */
-#define SPFX_SEARCH 0x0000200L	/* helps searching */
-#define SPFX_BEHEAD 0x0000400L	/* beheads monsters */
-#define SPFX_HALRES 0x0000800L	/* blocks hallucinations */
-#define SPFX_ESP    0x0001000L	/* ESP (like amulet of ESP) */
-#define SPFX_STLTH  0x0002000L	/* Stealth */
-#define SPFX_REGEN  0x0004000L	/* Regeneration */
-#define SPFX_EREGEN 0x0008000L	/* Energy Regeneration */
-#define SPFX_HSPDAM 0x0010000L	/* 1/2 spell damage (on player) in combat */
-#define SPFX_HPHDAM 0x0020000L	/* 1/2 physical damage (on player) in combat */
-#define SPFX_TCTRL  0x0040000L	/* Teleportation Control */
-#define SPFX_LUCK   0x0080000L	/* Increase Luck (like Luckstone) */
-#define SPFX_DMONS  0x0100000L	/* attack bonus on one monster type */
-#define SPFX_DCLAS  0x0200000L	/* attack bonus on monsters w/ symbol mtype */
-#define SPFX_DFLAG1 0x0400000L	/* attack bonus on monsters w/ mflags1 flag */
-#define SPFX_DFLAG2 0x0800000L	/* attack bonus on monsters w/ mflags2 flag */
-#define SPFX_DALIGN 0x1000000L	/* attack bonus on non-aligned monsters  */
-#define SPFX_DBONUS 0x1F00000L	/* attack bonus mask */
-#define SPFX_XRAY   0x2000000L	/* gives X-RAY vision to player */
-#define SPFX_REFLECT 0x4000000L /* Reflection */
-
+#define SPFX_NONE    0x00000000L /* no special effects, just a bonus */
+#define SPFX_NOGEN   0x00000001L /* item is special, bequeathed by gods */
+#define SPFX_RESTR   0x00000002L /* item is restricted - can't be named */
+#define SPFX_INTEL   0x00000004L /* item is self-willed - intelligent */
+#define SPFX_SPEAK   0x00000008L /* item can speak (not implemented) */
+#define SPFX_SEEK    0x00000010L /* item helps you search for things */
+#define SPFX_WARN    0x00000020L /* item warns you of danger */
+#define SPFX_ATTK    0x00000040L /* item has a special attack (attk) */
+#define SPFX_DEFN    0x00000080L /* item has a special defence (defn) */
+#define SPFX_DRLI    0x00000100L /* drains a level from monsters */
+#define SPFX_SEARCH  0x00000200L /* helps searching */
+#define SPFX_BEHEAD  0x00000400L /* beheads monsters */
+#define SPFX_HALRES  0x00000800L /* blocks hallucinations */
+#define SPFX_ESP     0x00001000L /* ESP (like amulet of ESP) */
+#define SPFX_STLTH   0x00002000L /* Stealth */
+#define SPFX_REGEN   0x00004000L /* Regeneration */
+#define SPFX_EREGEN  0x00008000L /* Energy Regeneration */
+#define SPFX_HSPDAM  0x00010000L /* 1/2 spell damage (on player) in combat */
+#define SPFX_HPHDAM  0x00020000L /* 1/2 physical damage (on player) in combat */
+#define SPFX_TCTRL   0x00040000L /* Teleportation Control */
+#define SPFX_LUCK    0x00080000L /* Increase Luck (like Luckstone) */
+#define SPFX_DMONS   0x00100000L /* attack bonus on one monster type */
+#define SPFX_DCLAS   0x00200000L /* attack bonus on monsters w/ symbol mtype */
+#define SPFX_DFLAG1  0x00400000L /* attack bonus on monsters w/ mflags1 flag */
+#define SPFX_DFLAG2  0x00800000L /* attack bonus on monsters w/ mflags2 flag */
+#define SPFX_DALIGN  0x01000000L /* attack bonus on non-aligned monsters  */
+#define SPFX_DBONUS  0x01F00000L /* attack bonus mask */
+#define SPFX_XRAY    0x02000000L /* gives X-RAY vision to player */
+#define SPFX_REFLECT 0x04000000L /* Reflection */
+#define SPFX_PROTECT 0x08000000L /* Protection */
 
 struct artifact {
 	short	    otyp;
diff --git a/include/artilist.h b/include/artilist.h
index dc42facce..0996b1fe0 100644
--- a/include/artilist.h
+++ b/include/artilist.h
@@ -1,5 +1,4 @@
 /* NetHack 3.5	artilist.h	$Date$  $Revision$ */
-/*	SCCS Id: @(#)artilist.h 3.5	2003/02/12	*/
 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
 /* NetHack may be freely redistributed.  See license for details. */
 
@@ -166,7 +165,7 @@ A("The Heart of Ahriman",	LUCKSTONE,
 
 A("The Sceptre of Might",	MACE,
 	(SPFX_NOGEN|SPFX_RESTR|SPFX_INTEL|SPFX_DALIGN), 0, 0,
-	PHYS(5,0),	NO_DFNS,	CARY(AD_MAGM),
+	PHYS(5,0),	DFNS(AD_MAGM),	NO_CARY,
 	CONFLICT,	A_LAWFUL, PM_CAVEMAN, NON_PM, 2500L ),
 
 #if 0	/* OBSOLETE */
@@ -189,11 +188,12 @@ A("The Magic Mirror of Merlin", MIRROR,
 
 A("The Eyes of the Overworld",	LENSES,
 	(SPFX_NOGEN|SPFX_RESTR|SPFX_INTEL|SPFX_XRAY), 0, 0,
-	NO_ATTK,	NO_DFNS,	CARY(AD_MAGM),
+	NO_ATTK,	DFNS(AD_MAGM),	NO_CARY,
 	ENLIGHTENING,	A_NEUTRAL,	 PM_MONK, NON_PM, 2500L ),
 
 A("The Mitre of Holiness",	HELM_OF_BRILLIANCE,
-	(SPFX_NOGEN|SPFX_RESTR|SPFX_DFLAG2|SPFX_INTEL), 0, M2_UNDEAD,
+	(SPFX_NOGEN|SPFX_RESTR|SPFX_DFLAG2|SPFX_INTEL|SPFX_PROTECT),
+		0, M2_UNDEAD,
 	NO_ATTK,	NO_DFNS,	CARY(AD_FIRE),
 	ENERGY_BOOST,	A_LAWFUL, PM_PRIEST, NON_PM, 2000L ),
 
@@ -209,7 +209,8 @@ A("The Master Key of Thievery", SKELETON_KEY,
 	UNTRAP,		A_CHAOTIC, PM_ROGUE, NON_PM, 3500L ),
 
 A("The Tsurugi of Muramasa",	TSURUGI,
-	(SPFX_NOGEN|SPFX_RESTR|SPFX_INTEL|SPFX_BEHEAD|SPFX_LUCK), 0, 0,
+	(SPFX_NOGEN|SPFX_RESTR|SPFX_INTEL|SPFX_BEHEAD|SPFX_LUCK|SPFX_PROTECT),
+		0, 0,
 	PHYS(0,8),	NO_DFNS,	NO_CARY,
 	0,		A_LAWFUL, PM_SAMURAI, NON_PM, 4500L ),
 
@@ -229,7 +230,7 @@ A("The Orb of Fate",		CRYSTAL_BALL,
 
 A("The Eye of the Aethiopica",	AMULET_OF_ESP,
 	(SPFX_NOGEN|SPFX_RESTR|SPFX_INTEL), (SPFX_EREGEN|SPFX_HSPDAM), 0,
-	NO_ATTK,	NO_DFNS,	CARY(AD_MAGM),
+	NO_ATTK,	DFNS(AD_MAGM),	NO_CARY,
 	CREATE_PORTAL,	A_NEUTRAL, PM_WIZARD, NON_PM, 4000L ),
 
 /*
diff --git a/include/extern.h b/include/extern.h
index 780876469..943366b8b 100644
--- a/include/extern.h
+++ b/include/extern.h
@@ -67,7 +67,8 @@ E boolean FDECL(arti_reflects, (struct obj *));
 E boolean FDECL(shade_glare, (struct obj *));
 E boolean FDECL(restrict_name, (struct obj *,const char *));
 E boolean FDECL(defends, (int,struct obj *));
-E boolean FDECL(protects, (int,struct obj *));
+E boolean FDECL(defends_when_carried, (int,struct obj *));
+E boolean FDECL(protects, (struct obj *,BOOLEAN_P));
 E void FDECL(set_artifact_intrinsic, (struct obj *,BOOLEAN_P,long));
 E int FDECL(touch_artifact, (struct obj *,struct monst *));
 E int FDECL(spec_abon, (struct obj *,struct monst *));
diff --git a/src/artifact.c b/src/artifact.c
index 4c5cce391..a20682ac3 100644
--- a/src/artifact.c
+++ b/src/artifact.c
@@ -1,5 +1,4 @@
 /* NetHack 3.5	artifact.c	$Date$  $Revision$ */
-/*	SCCS Id: @(#)artifact.c 3.5	2008/02/19	*/
 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
 /* NetHack may be freely redistributed.  See license for details. */
 
@@ -407,7 +406,7 @@ register struct obj *otmp;
 
 /* used for monsters */
 boolean
-protects(adtyp, otmp)
+defends_when_carried(adtyp, otmp)
 int adtyp;
 struct obj *otmp;
 {
@@ -418,6 +417,22 @@ struct obj *otmp;
 	return FALSE;
 }
 
+/* determine whether an item confers Protection */
+boolean
+protects(otmp, is_worn)
+struct obj *otmp;
+boolean is_worn;
+{
+	const struct artifact *arti;
+
+	if (is_worn && objects[otmp->oclass].oc_oprop == PROTECTION)
+	    return TRUE;
+	arti = get_artifact(otmp);
+	if (!arti) return FALSE;
+	return (arti->cspfx & SPFX_PROTECT) != 0 ||
+		(is_worn && (arti->spfx & SPFX_PROTECT) != 0);
+}
+
 /*
  * a potential artifact has just been worn/wielded/picked-up or
  * unworn/unwielded/dropped.  Pickup/drop only set/reset the W_ART mask.
@@ -548,6 +563,10 @@ long wp_mask;
 	    if (on) EReflecting |= wp_mask;
 	    else EReflecting &= ~wp_mask;
 	}
+	if (spfx & SPFX_PROTECT) {
+	    if (on) EProtection |= wp_mask;
+	    else EProtection &= ~wp_mask;
+	}
 
 	if(wp_mask == W_ART && !on && oart->inv_prop) {
 	    /* might have to turn off invoked power too */
diff --git a/src/mondata.c b/src/mondata.c
index d2f5b03ab..e4203297c 100644
--- a/src/mondata.c
+++ b/src/mondata.c
@@ -113,7 +113,7 @@ struct monst *mon;
 	for ( ; o; o = o->nobj)
 	    if (((o->owornmask & slotmask) != 0L &&
 			objects[o->otyp].oc_oprop == ANTIMAGIC) ||
-		    (o->oartifact && protects(AD_MAGM, o)))
+		    (o->oartifact && defends_when_carried(AD_MAGM, o)))
 		return TRUE;
 	return FALSE;
 }
@@ -150,7 +150,7 @@ struct monst *mon;
 	for ( ; o; o = o->nobj)
 	    if (((o->owornmask & slotmask) != 0L &&
 			objects[o->otyp].oc_oprop == BLINDED) ||
-		    (o->oartifact && protects(AD_BLND, o)))
+		    (o->oartifact && defends_when_carried(AD_BLND, o)))
 		return TRUE;
 	return FALSE;
 }
diff --git a/src/trap.c b/src/trap.c
index 51cf074d7..8ef4a10df 100644
--- a/src/trap.c
+++ b/src/trap.c
@@ -1231,7 +1231,7 @@ glovecheck:		(void) rust_dmg(uarmg, "gauntlets", 1, TRUE, &youmonst);
 		       also increases the effect */
 		    for (otmp = invent; otmp; otmp = otmp->nobj)
 			if (otmp->oartifact && !is_quest_artifact(otmp) &&
-			    protects(AD_MAGM, otmp)) break;
+			    defends_when_carried(AD_MAGM, otmp)) break;
 		    if (otmp) dmgval2 += rnd(4);
 		    if (Passes_walls) dmgval2 = (dmgval2 + 3) / 4;
 
@@ -2399,7 +2399,8 @@ glovecheck:		    target = which_armor(mtmp, W_ARMG);
 				    otmp->oartifact == ART_MAGICBANE)
 				dmgval2 += rnd(4);
 			    for (otmp = mtmp->minvent; otmp; otmp = otmp->nobj) 
-				if (otmp->oartifact && protects(AD_MAGM, otmp))
+				if (otmp->oartifact &&
+					defends_when_carried(AD_MAGM, otmp))
 				    break;
 			    if (otmp) dmgval2 += rnd(4);
 			    if (passes_walls(mptr)) dmgval2 = (dmgval2 + 3) / 4;