Although the pages in this sketchbook are numbered individually, consecutive pages have been catalogued under a single record (e.g. SM volume 50/1-2, 3-4 and 5-6).
The six drawings catalogued here all relate to the rooms beneath the Painted Chamber, especially the small vaulted room at the east end of the building. The drawings were all made by Charles James Richardson (1806-71), Soane's assistant, over the course of two days in March 1827. Several drawings of the Painted Chamber are reproduced in H. Colvin, "Views of the Old Palace of Westminster", Architectural History, 9, 1966, pp. 21+23-184, including copies of SM volume 50/2 and SM volume 50/4 (figs 104 and 118) as well as views of the basement by William Capon (1757-1827).