Merchant of Castletown and Speaker of the House of Keys at the time of the 1792 inquiry.

He was returned to the Keys in 1752 and sat there for the rest of his life. Examined by the Commissioners of Inquiry at Castletown on Saturday 15 October 1791, he told them he had been a member of the House these forty years and upwards, and Speaker for six or seven, and that the House consisted of twenty-four members filling their own vacancies.

His evidence is one of the fullest accounts of how the Keys actually worked. He described the closing of a session, when the Speaker informs the Governor that the business is finished, asks whether he has any further commands, and then adjourns the House without a day. He set out the original jurisdiction of the Keys over complaints against their own members in their public capacity, and over libel or scandal touching the public magistrates or the House itself. He held that the attestation of Governor, Council and Keys to the promulgation of an Act of Tynwald was the act of each of those persons signing in a legislative capacity. He had also, for some years, superintended the application of the Lord's carriage services for the southern division, which went to the repairs of Castle Rushen and to work on the Lord's demesnes.

He led the House's dealings with the inquiry. In September 1791 the Keys appointed him first of a committee of seven to attend the Commissioners on the Duke of Atholl's claims, and in October he signed their observations on the public buildings and harbours as Speaker.

His own claim ran alongside. He and John Stevenson petitioned the Commissioners over the old harbour debts in October 1791, and Taubman separately memorialised the Treasury for a debt settled at £337 3s 4½d English in December 1774, which with interest at six per cent and one payment received stood at £602 12s 6¼d by 1790.