John Ayrton Paris to Faraday   c May 1827

Dear Sir,

I should have called upon you long ago to have thanked you for your work¹; which I consider as an invaluable treasure to every practical Chemist. I have read it with much pleasure, and have only been prevented by a severe illness from expressing my opinion to you personally. I was attacked more than a fortnight since with inflammation in the trachea, which extended to the lungs, and has obliged me to submit to the ordeal of bleeding, blistering and all the privations usually associated with it. I have enclosed you a small quantity of a urine sediment, I wish you would test it for me, & see whether it consists of lithic acid or the phosphates.

I hope in course of the present week to be able to return the compliment of your book by the presentation of another, of which you may have heard something².

Yours faithfully | J.A. Paris

Dover Street | Monday Morning