Include letters and photocopies of primary sources collated by Lady Margaret Keynes as well as original letters and scripts for plays. Letters between [George] Darwin and C. Henrywood. John Stevenson, Mr. Saint, Richard Litchfield, Charles Bidwell, Gillet & Co., Karl Pearson, Allan W. Rucker, Thomas Wright, W. Holland, and H.S. Schultess-Young. These letters cover topics like building works at Newnham Grange, Computing Machines, and mathematics. Also includes letters jointly addressed to Maud and George Darwin from Carline Jebb, Ritter, Charles Meredith and Herbert Du Puy, as well as a letter to Maud [Darwin] from Lady Darwin. Also includes photographs of G.H. Darwin, Maud Darwin, group photograph of the Darwin’s - includes Margaret, Gwen, Bernard, Eils, Ruth, Nora, Aunts and Uncles Maud, George, Frank, Francis Cornford, [?], Ida, and Horace. Other original sources collated for A House by the River include scripts for Professor Giles' Mumming Play - 'A Christmas Mummery', 'A Witch of Curses', 'The Bishop's Candlesticks' by Norman McKinnel, 'Backward Child' by H.L. Childe Pemberton, Poem by Bernard Darwin, 'The Magic Snowboot', and 'The Importance of Being Frank or What is in a Name'. Letters contemporary to the writing of A House by the River include letters to Lady Margaret Keynes from Aunt Emma, John Saltmarsh, Louisa and Laurie Rhinelander, Helen Pease (nee Wedgewood), the city surveyor and a letter to Mona Darwin. These letters contain information about Billy [William Robert Darwin], early history and advice on research, stories of visits to Newnham Grange, Allan Wedgwood, Josiah Clement Wedgewood, and Silver Street.