Letter from Thomas Mc Donough to Increase Lapham

Office of the R. R. V. U. Rail Road Co.
Fond du Lac, Wis., Feby 17 1852.

[Table of elevations.]

I A Lapham Dear Sir

Above I send a table of the elevations of the ground for
64,000 feet from this place southerly as distances of 2000 feet
apart, these elevations are in feet above lake Winnebago,
I hope it may be of service to you and would continue it further
had I the minutes here with me,
I do not see how the action in Lake Horicon can be attributed to the
causes you mention since similar causes do not produce like
results in other places Yours Truly
T McDonough.