The items are for the most part undated. They chiefly consist of sociological diagrams of the 'Thinking machine' type, with several biological and town-planning diagrams and drawings. Also included is a watercolour sketch plan of the Paris Exhibition of 1900 (no. 44), designs for New Crosby Hall, Chelsea (nos. 51-53), and plans for properties at Roseburn Cliff and Mount Tabor.