Interior view of the Government Laboratories, by Halftones Limited A male technician, with a waxed moustache, is shown standing, cleaning or lighting a burner, on a laboratory bench bearing similar gas burners. Taken at the Government Laboratories at Clement's Inn Passage, Strand, London. Not captioned verso. Stamped: 'Halftones Limited. 17, Fleet Street, London, E.C.'. c.1901 [?]