Sometime Collector of Excise in Inverness (abt. 1773). Formerly of Ayr.
Keith called on Boswell and Dr Johnson following their arrival in Inverness in the evening of August 28, 1773, inviting them to dine with him and to go to the English chapel on the next day. Boswell, apparently, knew Keith from Ayr.
On the next day, Keith breakfasted with Boswell and Johnson, before going together to the Chapel, which, according to Boswell, was "but a poor one". After church, they went together to the Quay, where they met the painter Alves, who Boswell had previously seen in Rome in 1765. They continued to see Macbeth's Castle, before going to Keith's for dinner. Here they were joined by Keith's wife, a Miss Duff, and, later, Rev. Alexander Grant for tea. In the evening, Keith and Grant supped with them at their inn.