1. IOR/L/PJ/6/1109, File 3409 Reference (shelfmark): IOR/L/PJ/6/1109, File 3409 Title: Application from Mr J T Filson, District Supt of Police, Madras on leave, for permission to visit Scotland Yard to study the system of marking Collection Area: India Office Records and Private Papers Languages: English Date Range: 4 Sep 1911 Extent: 1 file