Letters and postcards mainly from Foster.

Nineteen of the letters and postcards are to L.C. (Leonard Charles) Wooldridge, (1857-1889). These concern the latter's research on coagulation, publications in the Proceedings of the Royal Society, and the Croonian lecture Wooldridge delivered in 1886.

Recipients also include William Henry Flower (1831-1899), conferring about who should attend Richard Owen's funeral on behalf of the Royal Society, Thomas Henry Huxley (1825-1895), and Ernest Henry Starling (1866-1927). There is also a letter to J. Milner (John Milner) Fothergill (1841-1888) and Foster's reply, on the digestion of fat.

At Wellcome Collection:

SA/PHY, the archives of the Physiological Society, contain material from and about Foster. PP/ESS, the papers of Sir Edward Albert Sharpey-Schafer, contain correspondence with Foster. Foster material is also included in: MS.7220, the papers of Henry Charlton Bastian; PP/HHD, the papers of Sir Henry Hallett Dale, MS.5424, the papers of Ernest Abraham Hart; and MSS.3417, 6129-6132 & 7245, the papers of Sir Patrick Manson.