Like his elder brother James and several other members of the family, Alexander gained considerable wealth and influence from a career in the service of the East India Company. James wrote to their uncle, the 1st earl of Caledon, 13 Dec. 1800, that Josias, who had already held a number of appointments, had been promised the office of commercial resident in Ceylon:
I sent my mother the favourable testimony which [the governor] Mr. [Frederick] North† was good enough to express of his conduct. I think to be so early called into notice and placed in a situation which must exercise his talents will be of service to him. He is very attentive to his duty and is generally liked from his good temper and obliging disposition.PRO NI, Caledon mss D2432/5/4/4.
He did not in fact receive this appointment, but, having in the meantime obtained another, in 1803 he left for Calcutta, where he became established as a merchant, agent, banker and naval agent.
besides, he really has a warm heart, and will be glad when he sees all its bearings and effects to enter into a measure which promises aggrandizement to the family. I have been too scrupulous in not talking to him more on these subjects, and opening views and considerations to him which are not apt to influence Indians. India is a good nest-egg for the family, and if the fortunes made there and realized here were judiciously and wisely directed and applied here, the consequent influence would be very great.Caledon mss B/4/1/59 (NRA 13276).
Nothing came of the Irish plans, but Josias, who acquired a Hampshire estate, did co-operate with his brother in their purchase of the borough of Old Sarum from Caledon, who had returned James there since 1812. He seems to have deferred to James in the choice of Members, but was himself returned in July 1820, immediately after the purchase had been agreed.
Alexander was an entirely silent supporter of the Liverpool administration, but he did not attend as frequently as his brother, from whom, as they were sometimes both referred to as ‘J. Alexander’, he cannot always be distinguished.
He is also likely to have been the one who voted for Catholic claims, 6 Mar. 1827. He divided in favour of going into committees on the duke of Clarence’s grant, 16 Mar., and (or was it James?) on the spring guns bill, 23 Mar. He was granted three weeks’ leave of absence because of illness in his family, 23 Mar. Unless it was his second cousin Henry Alexander, Member for Barnstaple, it was he who, in April 1827, was depicted in a cartoon of the directors of the East India Company, saying that ‘so help me God, I have no more connection now with the firm [of Fletcher, Alexander and Company], than either Alexander the Great or Alexander the Pope’.
Alexander was deprived of his seat at Old Sarum by the Reform Act and did not sit in the Commons again. He died in August 1839, at Stone House, Broadstairs, Kent, his then residence.
