[Lettre de Henry Hugh Peter Deasy à Henri Poincaré, secrétaire du Bureau des Longitudes]

I can if necessary stop in Paris on my way to London if you should wish to see me. You are at liberty to communicate with M. Clements Markham President of the Royal Geographical society London or with M. J Coles Instructor in surveying – practical astronomy to the Royal Geographical society with reference to me, should you desire to do so I beg to enclose my card to remain

Yours Faithfully

H H P Deasy

Poste Restante

Karlsbad

Bohemia

Jan 5/96

To the secretary

Bureau des Longitudes

Paris

Dear sir

I am informed that the Bureau des Longitudes is preparing magnetic charts of the world and in order to do so accurately intends to dispatch one or two vessels to take a series of magnetic observations. As far as I <can> ascertain there is not a single published account of magnetic observations being taken in Tibet and other equally unknown and seldom visited parts of Central Asia. I am anxious to know if the results of a long series of magnetic observations taken with a six inch transit astronomical theodolite in Central Asia & Tibet will be of use to the Bureau des Longitudes and on what terms they will be accepted. I beg to inform you that I have studied practical astronomy for some years and taken many magnetic observations with the instrument I have mentioned, with a view to obtaining as accurate as possible scientific results when travelling in places where no reliable scientific observations have been carried out. I do not ask for money in advance to enable me to spend my leave travelling and observing in the places I have mentioned, but only wish to know if the Bureau will accept the results of my observations and on what terms.