An advertisement of this firm is found in Hand-book for travellers in France [by J. Murray. 1st] 3rd-14th, 16th, 18th ed pg. 64 John Murray, 1859(Google eBook) http://books.google.ca/books?id=JAQIAAAAQAAJ&pg=RA1-PA64 (accessed 02/05/2015)
and on this Edward B. Eastwick A handbook for India; being an account of the three presidencies and of the Overland route, intended as a guide for travellers, officers and civilians, with vocabularies and dialogues of the spoken languages of India: With travelling map and plans of towns, pg. 70 John Murray, 1859(Google eBook) http://books.google.ca/books?id=0ENCAAAAcAAJ&pg=PA70 (accessed 02/05/2015)