diff --git a/Source/dead.cpp b/Source/dead.cpp
index 791073d9e..4ea475b7d 100644
--- a/Source/dead.cpp
+++ b/Source/dead.cpp
@@ -60,8 +60,8 @@ void __cdecl InitDead()
 	_LOBYTE(dead[v4]._deadtrans) = 0;
 	dead[v4]._deadFrame = 8;
 	v5 = (unsigned int)misfiledata[18].mAnimData[0];
-	dead[v4].field_24 = 128;
-	dead[v4].field_28 = 32;
+	dead[v4]._deadWidth = 128;
+	dead[v4]._deadWidth2 = 32;
 	v6 = v0 + 1;
 	spurtndx = v0 + 1;
 	memset32(&dead[v6], v5, 8u);
@@ -69,8 +69,8 @@ void __cdecl InitDead()
 	stonendx = v0 + 2;
 	v7 = nummonsters;
 	dead[v6]._deadFrame = 12;
-	dead[v6].field_24 = 128;
-	dead[v6].field_28 = 32;
+	dead[v6]._deadWidth = 128;
+	dead[v6]._deadWidth2 = 32;
 	v17 = v0 + 2;
 	if ( v7 > 0 )
 	{
diff --git a/Source/lighting.cpp b/Source/lighting.cpp
index eea60cde3..19b093441 100644
--- a/Source/lighting.cpp
+++ b/Source/lighting.cpp
@@ -274,7 +274,7 @@ char CrawlTable[2749] =
 		-15, -3, 15, -3, -15, 2, 15, 2,
 		-15, -2, 15, -2, -15, 1, 15, 1,
 		-15, -1, 15, -1, -15, 0, 15, 0,
-	128,
+	(char)128,
 		0, 16, 0, -16, -1, 16, 1, 16,
 		-1, -16, 1, -16, -2, 16, 2, 16,
 		-2, -16, 2, -16, -3, 16, 3, 16,
@@ -307,7 +307,7 @@ char CrawlTable[2749] =
 		-16, -3, 16, -3, -16, 2, 16, 2,
 		-16, -2, 16, -2, -16, 1, 16, 1,
 		-16, -1, 16, -1, -16, 0, 16, 0,
-	136,
+	(char)136,
 		0, 17, 0, -17, -1, 17, 1, 17,
 		-1, -17, 1, -17, -2, 17, 2, 17,
 		-2, -17, 2, -17, -3, 17, 3, 17,
@@ -342,7 +342,7 @@ char CrawlTable[2749] =
 		-17, -3, 17, -3, -17, 2, 17, 2,
 		-17, -2, 17, -2, -17, 1, 17, 1,
 		-17, -1, 17, -1, -17, 0, 17, 0,
-	144,
+	(char)144,
 		0, 18, 0, -18, -1, 18, 1, 18,
 		-1, -18, 1, -18, -2, 18, 2, 18,
 		-2, -18, 2, -18, -3, 18, 3, 18,
diff --git a/Source/missiles.cpp b/Source/missiles.cpp
index fbb5c5129..6fa73fecb 100644
--- a/Source/missiles.cpp
+++ b/Source/missiles.cpp
@@ -7,9 +7,9 @@ int missileavail[MAXMISSILES];
 MissileStruct missile[MAXMISSILES];
 int nummissiles; // idb
 int ManashieldFlag;
-unk_missile_struct misflagstruct_unknown[MAXMISSILES];
+ChainStruct chain[MAXMISSILES];
 int MissilePreFlag; // weak
-int unk_missile_flag; // weak
+int numchains; // weak
 
 MissileData missiledata[68] =
 {
@@ -2316,8 +2316,8 @@ void __cdecl InitMissiles()
 		++v4;
 	}
 	while ( v4 < MAXMISSILES );
-	unk_missile_flag = 0;
-	v5 = &misflagstruct_unknown[0].field_4;
+	numchains = 0;
+	v5 = &chain[0]._mitype;
 	do
 	{
 		*(v5 - 1) = -1;
@@ -2325,7 +2325,7 @@ void __cdecl InitMissiles()
 		v5[1] = 0;
 		v5 += 3;
 	}
-	while ( (signed int)v5 < (signed int)&misflagstruct_unknown[MAXMISSILES].field_4 );
+	while ( (signed int)v5 < (signed int)&chain[MAXMISSILES]._mitype );
 	v6 = 0;
 	do
 	{
@@ -2342,7 +2342,7 @@ void __cdecl InitMissiles()
 	}
 	while ( v6 < 112 );
 }
-// 64CCD8: using guessed type int unk_missile_flag;
+// 64CCD8: using guessed type int numchains;
 
 void __fastcall AddLArrow(int mi, int sx, int sy, int dx, int dy, int midir, int mienemy, int id, int dam)
 {
diff --git a/Source/missiles.h b/Source/missiles.h
index ddafcb9a8..ec48d7de7 100644
--- a/Source/missiles.h
+++ b/Source/missiles.h
@@ -7,9 +7,9 @@ extern int missileavail[MAXMISSILES];
 extern MissileStruct missile[MAXMISSILES];
 extern int nummissiles; // idb
 extern int ManashieldFlag;
-extern unk_missile_struct misflagstruct_unknown[MAXMISSILES];
+extern ChainStruct chain[MAXMISSILES];
 extern int MissilePreFlag; // weak
-extern int unk_missile_flag; // weak
+extern int numchains; // weak
 
 void __fastcall GetDamageAmt(int i, int *mind, int *maxd);
 int __fastcall CheckBlock(int fx, int fy, int tx, int ty);
diff --git a/Source/scrollrt.cpp b/Source/scrollrt.cpp
index dafdd4f17..eb38f2b15 100644
--- a/Source/scrollrt.cpp
+++ b/Source/scrollrt.cpp
@@ -979,7 +979,7 @@ void __fastcall scrollrt_draw_clipped_dungeon(char *a1, int sx, int sy, int a4,
 		{
 			v11 = &dead[(v7 & 0x1F) - 1];
 			v12 = (int *)v11->_deadData[(v7 >> 5) & 7];
-			v13 = a4 - v11->field_28;
+			v13 = a4 - v11->_deadWidth2;
 			if ( v12 )
 			{
 				v14 = v11->_deadFrame;
@@ -987,9 +987,9 @@ void __fastcall scrollrt_draw_clipped_dungeon(char *a1, int sx, int sy, int a4,
 				{
 					v15 = v11->_deadtrans;
 					if ( v15 )
-						Cl2DecodeFrm5(v13, a5, (char *)v12, v14, v11->field_24, 0, 8, v15);
+						Cl2DecodeFrm5(v13, a5, (char *)v12, v14, v11->_deadWidth, 0, 8, v15);
 					else
-						Cl2DecodeFrm6(v13, a5, (char *)v12, v14, v11->field_24, 0, 8);
+						Cl2DecodeFrm6(v13, a5, (char *)v12, v14, v11->_deadWidth, 0, 8);
 				}
 			}
 		}
@@ -1652,7 +1652,7 @@ void __fastcall scrollrt_draw_clipped_dungeon_2(char *buffer, int x, int y, int
 		{
 			v14 = &dead[(v9 & 0x1F) - 1];
 			v15 = (int *)v14->_deadData[(v9 >> 5) & 7];
-			v16 = v13 - v14->field_28;
+			v16 = v13 - v14->_deadWidth2;
 			if ( v15 )
 			{
 				v17 = v14->_deadFrame;
@@ -1660,9 +1660,9 @@ void __fastcall scrollrt_draw_clipped_dungeon_2(char *buffer, int x, int y, int
 				{
 					v18 = v14->_deadtrans;
 					if ( v18 )
-						Cl2DecodeFrm5(v16, sy, (char *)v15, v17, v14->field_24, a5, 8, v18);
+						Cl2DecodeFrm5(v16, sy, (char *)v15, v17, v14->_deadWidth, a5, 8, v18);
 					else
-						Cl2DecodeFrm6(v16, sy, (char *)v15, v17, v14->field_24, a5, 8);
+						Cl2DecodeFrm6(v16, sy, (char *)v15, v17, v14->_deadWidth, a5, 8);
 				}
 			}
 		}
@@ -2254,7 +2254,7 @@ void __fastcall scrollrt_draw_dungeon(char *buffer, int x, int y, int a4, int a5
 		{
 			v13 = &dead[(v9 & 0x1F) - 1];
 			v14 = (int *)v13->_deadData[(v9 >> 5) & 7];
-			v15 = sx - v13->field_28;
+			v15 = sx - v13->_deadWidth2;
 			if ( v14 )
 			{
 				v16 = v13->_deadFrame;
@@ -2262,9 +2262,9 @@ void __fastcall scrollrt_draw_dungeon(char *buffer, int x, int y, int a4, int a5
 				{
 					v17 = v13->_deadtrans;
 					if ( v17 )
-						Cl2DecodeFrm3(v15, sy, (char *)v14, v16, v13->field_24, 0, a5, v17);
+						Cl2DecodeFrm3(v15, sy, (char *)v14, v16, v13->_deadWidth, 0, a5, v17);
 					else
-						Cl2DecodeLightTbl(v15, sy, (char *)v14, v16, v13->field_24, 0, a5);
+						Cl2DecodeLightTbl(v15, sy, (char *)v14, v16, v13->_deadWidth, 0, a5);
 				}
 			}
 		}
diff --git a/structs.h b/structs.h
index 2fae1a9e5..b8013c737 100644
--- a/structs.h
+++ b/structs.h
@@ -378,11 +378,11 @@ struct MisFileData
 	int mAnimWidth2[16];
 };
 
-struct unk_missile_struct
+struct ChainStruct
 {
-	int field_0;
-	int field_4;
-	int field_8;
+	int idx;
+	int _mitype;
+	int _mirange;
 };
 
 struct MissileStruct
@@ -1226,8 +1226,8 @@ struct DeadStruct
 {
 	unsigned char *_deadData[8];
 	int _deadFrame;
-	int field_24; // width
-	int field_28; // cel or fnum _deadtype?
+	int _deadWidth;
+	int _deadWidth2;
 	int _deadtrans;
 };