diff --git a/nx01-x4o-fc18/src/main/java/org/x4o/fc18/zion7/FourCornerZionStenoLexer.java b/nx01-x4o-fc18/src/main/java/org/x4o/fc18/zion7/FourCornerZionStenoLexer.java
index 0284341..49f06ab 100644
--- a/nx01-x4o-fc18/src/main/java/org/x4o/fc18/zion7/FourCornerZionStenoLexer.java
+++ b/nx01-x4o-fc18/src/main/java/org/x4o/fc18/zion7/FourCornerZionStenoLexer.java
@@ -307,7 +307,7 @@ public class FourCornerZionStenoLexer {
 			for (int i = idxFirst; i <= idxLast; i++) {
 				int bitIdx = lexer.input.get(i);
 				if (bitIdx != 0 && bitIdx < bitIdxLast) {
-					lexer.smokeSignals.burnSandWormSignOutOfOrder(lexer.currLine, lexer.currCol);
+					lexer.smokeSignals.burnSandWalkerOutOfRhythm(lexer.currLine, lexer.currCol);
 					return;
 				}
 				bitIdxLast = bitIdx;
@@ -337,7 +337,7 @@ public class FourCornerZionStenoLexer {
 			}
 			int wormHeadSize = sandwormHead.size();
 			if (!WORM_SIGN.contains(wormHeadSize)) {
-				lexer.smokeSignals.burnSandWormSignIncorrect(lexer.currLine, lexer.currCol, wormHeadSize);
+				lexer.smokeSignals.burnSandWalkerStepUnaligned(lexer.currLine, lexer.currCol, wormHeadSize);
 				return;
 			}
 			// Sand walking signal pulses have been stamped correctly to call the worm
diff --git a/nx01-x4o-fc18/src/main/java/org/x4o/fc18/zion7/FourCornerZionStenoLexerSmoke.java b/nx01-x4o-fc18/src/main/java/org/x4o/fc18/zion7/FourCornerZionStenoLexerSmoke.java
index 54b8f27..1920e86 100644
--- a/nx01-x4o-fc18/src/main/java/org/x4o/fc18/zion7/FourCornerZionStenoLexerSmoke.java
+++ b/nx01-x4o-fc18/src/main/java/org/x4o/fc18/zion7/FourCornerZionStenoLexerSmoke.java
@@ -41,9 +41,9 @@ public interface FourCornerZionStenoLexerSmoke {
 	void burnUNI21UnusedBigIndian(int line, int col);
 	
 	
-	void burnSandWormSignOutOfOrder(int line, int col);
+	void burnSandWalkerOutOfRhythm(int line, int col);
 	
-	void burnSandWormSignIncorrect(int line, int col, int size);
+	void burnSandWalkerStepUnaligned(int line, int col, int size);
 	
 	
 	interface Adapter extends FourCornerZionStenoLexerSmoke {
@@ -69,11 +69,11 @@ public interface FourCornerZionStenoLexerSmoke {
 		}
 		
 		@Override
-		default void burnSandWormSignOutOfOrder(int line, int col) {
+		default void burnSandWalkerOutOfRhythm(int line, int col) {
 		}
 		
 		@Override
-		default void burnSandWormSignIncorrect(int line, int col, int size) {
+		default void burnSandWalkerStepUnaligned(int line, int col, int size) {
 		}
 	}
 }