Ho Hillary,
 
I've been searching many ways for your horn! Interesting topic.
 
The best I found are photos online by the Library of Congress American Memory project
http://www.loc.gov/fedsearch/records.tkl?cclquery=slave+horn%20&start=1&id=target-ppoc.tkl&targets%5B%5D=ppoc&targets%5B%5D=recommend&alltargets=targets%5B%5D~ppoc|targets%5B%5D~webpages|targets%5B%5D~recommend|
 
Found by a web search using the terms
slave horn             or     "cow horn"  slave
 
Perhaps on online inquiry to the Library of Congress reference staff might help too.                Best wishes, Barbara Hass, retired librarian



========================================================= Important Subscriber Information:

The Museum-L FAQ file is located at http://www.finalchapter.com/museum-l-faq/ . You may obtain detailed information about the listserv commands by sending a one line e-mail message to [log in to unmask] . The body of the message should read "help" (without the quotes).

If you decide to leave Museum-L, please send a one line e-mail message to [log in to unmask] . The body of the message should read "Signoff Museum-L" (without the quotes).