Fantastic piece of history - thanks Tim.
My thoughts are that the date is not a later commerative date, but rather reflects the period of actual use. Clark's campaigns in Indiana and Illinois were 1778 and 79, if I recall correctly. In 1774 he was surveying lands in the Ohio Valley, and was part of Michael Cresap's group involved in the incidents that led up to Logan's/ Dunmore's War. (But not the Yellow Creek massacre - if what I have read is correct, Clark and Cresap gave some thought to attacking the camp at the mouth of Yellow Creek, but turned back as they both were familiar with Logan. However, Cresap unfortunately still got blamed for it).
Clark also led campaigns against the Shawnee towns in the Great and Little Miami valleys in 1780 and 82, tried to organize an exepedition against Detroit in 1781, and also organized a campaign against some of the towns on the upper Wabash in 1786 in conjunction with a multi-pronged offensive that was planned against the northwest tribes.
So the 1774 date would likely not be commerative of this man's service with Clark - rather, I believe it would indicate that he had the horn already and probably did use it with Clark in 1778, '79 or '86.
Guy
