[etcetera]

Interesting. I can understand the "rat" part of the name by the pictures. But the "musk" part of the name kinda implies that it has a smell?

[chadwimc]

Musk glands on their hind ends. I hear it was used for perfume before it was synthesized(sp?). I still use it for bait to attract other critters. Mix it in a glass jar with vasoline and glycerine, then... Naw I better not descibe it. Some things are better left a secret for us trappers.

Beaver castors are still used.