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North Western Sanitary Fair.

DEPARTMENT OF NATURAL HISTORY, GEOLOGY,
& MINERALOGY.

Office No. 66, Madison St. Chicago April 28th 1865.

I. A. Lapham

Dear Sir -

Have just returned from
a trip to the Oil Region of Ohio + Pa.

I am glad to see your promise to do -
even so much - as you propose - and I
will send such collections, as you may
desire, from this Museum to yours. Supposing
that ours is over - about the time yours
begins - I am sure I can send you a
large collection of Mineral & Crystal,
I hope your Contribution will be ready
by the 20th May.

Yours Truly

C. D. Wilber