diff --git a/monster/demon/Big_Demon/big_demon.base.LICENSE b/monster/demon/Big_Demon/big_demon.base.LICENSE
new file mode 100644
index 000000000..676723a40
--- /dev/null
+++ b/monster/demon/Big_Demon/big_demon.base.LICENSE
@@ -0,0 +1,3 @@
+comment Derived from original Crossfire XPM images. Unknown source, but predates CVS repo date of March 1999.
+license unknown
+sourcename Crossfire XPM
diff --git a/monster/demon/Big_Demon/big_demon.clsc.LICENSE b/monster/demon/Big_Demon/big_demon.clsc.LICENSE
new file mode 100644
index 000000000..676723a40
--- /dev/null
+++ b/monster/demon/Big_Demon/big_demon.clsc.LICENSE
@@ -0,0 +1,3 @@
+comment Derived from original Crossfire XPM images. Unknown source, but predates CVS repo date of March 1999.
+license unknown
+sourcename Crossfire XPM
diff --git a/monster/demon/imp.clsc.LICENSE b/monster/demon/imp.clsc.LICENSE
new file mode 100644
index 000000000..676723a40
--- /dev/null
+++ b/monster/demon/imp.clsc.LICENSE
@@ -0,0 +1,3 @@
+comment Derived from original Crossfire XPM images. Unknown source, but predates CVS repo date of March 1999.
+license unknown
+sourcename Crossfire XPM