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He paid Duty in 1784 for the apprentice indentures of Robert Cook, entered his last mark at Goldsmiths’ Hall as a case maker in 1785, paid for a trade directory entry as a watch case maker in 1790 and was assessed to Land Tax until 1813 all from Plumtree Street, Bloomsbury. A new tenant was assessed on the property in 1814.
Page 206 of Watchmakers and Clockmakers of the World lists James Macklin as free in 1767 and a liveryman in the Clockmakers Company from 1812-15.

3 September 1760 James son of James Macklin mariner of Salisbury apprenticed to Charles Terry Dyer of London.

26 June 1766 James Macklin discharged from any longer servitude to Charles Terry by order of the mayor and aldermen of the City of London. Charles Terry did not maintain a work place for his apprentice once he had moved. Therefore James Macklin was turned over the same day to Thomas Layton farrier of London. Charles Terry's trade was watch case maker as was Thomas Layton's.

4 December 1767 Free.