Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Mr B. Wentworth; 44 Fourth Street, Dover, N.H., USA 'In reply to your letter of July 10th, I think you are a little out in your calculation. A guinea (£1.1.0.) in American equivalent is about 4 dollars 75 cents, not two and one-half as you suggest.' 23 July 1923