1To James Madison from William Beach Lawrence, 30 January 1828 (Madison Papers)
As supplementary to the testimonials in favour of Mr Ritchie, which I last week had the honour to transmit, I now beg leave to enclose a letter from Mr Herschell to Mr Key and one from Capt Sabine to myself. Mr Herschell was the late and Capt Sabine is the present Secretary of the Royal Society and they are both among the most esteemed scientific men of this Country. The latter gentleman was...