In late 1849 the company began a service from Liverpool to Gibraltar, Malta and Constantinople, using its new iron screw steamer the 500 ton Bosphorus.
Mare and Company at Leamouth, London (builders of the earlier vessels) for the new ships Queen of the South, Lady Jocelyn, Indiana, Calcutta, Mauritius and Hydaspes In May 1852 an additional mail contract was secured, for the company to provide a monthly service between England and Madras and Calcutta, via Cape St. Vincent, Ascension Island, St. Helena, Cape Town, Mauritius and Ceylon.
[2] An article in the Sydney Morning Herald in February 1853 describes the somewhat "unpropitious" circumstances which marked the journey from London to Port Jackson of the third of the Australian Royal Mail Steam Navigation Company's steamships, the Melbourne.
[3] The General Screw Steam Shipping Company's new steamer, the 1800-ton Argo, sailed from Southampton on 8 May 1853[2] and reached Melbourne in 64 days, with one stop en route at Cape St. Vincent.
The company chartered its new and now superfluous ships Golden Fleece, Jason and The Prince to the government to carry troops to the Mediterranean.