"It is earnestly desired to make the work in question as complete as
possible, and therefore it is especially hoped that your response will
cover the ground as pointed out by the several questions as thoroughly
as you may be able and willing to make it.

"In addition to notes, a reference to published papers either by
yourself or others is desirable, as well as the names of those persons
who may be able to furnish the needed information.

"Permit me to assure you that, while it is not offered in the way of
inducement to secure the service asked, since it is barely possible
that you can be otherwise than deeply interested in the extension of
the bounds of knowledge, full credit will be given you in the work for
whatever information you may be pleased to furnish.

"This material will be published under the auspices of Prof. J.W.
Powell, in charge of the U. S Geographical and Geological Survey of
the Rocky Mountain Region.

"Communications may be addressed to me either at the address given
above or at the Army Medical Museum, Washington, D. C.

"Respectfully, yours,

"H. C. YARROW."


This was forwarded to every Indian agent, physicians at agencies, to a
great number of Army officers who had served or were serving at