Collection: Ezra Pound Letters 1907-1941 Letter ID: 5_p43 Date: 18-08-1912 Source: D. D. Paige, ed., The Letters of Ezra Pound, 1907-1941. London : Faber and Faber, 1951.
Collection: Karl Marx and Frederick Engels Correspondence 1870-1895 Letter ID: 259p434v44 Date: 1872-10-01 Source: Karl Marx and Frederick Engels: Collected Works. Vol. 44. London: Lawrence and Wishart, 1989
Sender Address: 122 Regent's Park Road, N.W., London