ALS: Dartmouth College Library
the 1 of March. 1782.
The Shinning of the Sun is by no means nécéssary to the experiments I intend to Show you. Thus I flatter myself to have the pleasure to See you on monday next, let the weather be what it may.
With great regard I have the honour to be Sir Your most obédient humble Servant
Notation: Marat 1er. Mars 1782.