Laing 3.2.1799 adv at Mackintosh's / 28.7.1807 Johnson's w Laing, bookseller / 30.6.1809 at Johnson's Laing, br, & son / 27.7.1810 at St Paul's with Laing & two
Malcolm Laing DNB 1762-1818 (or perhaps his brother Samuel DNB 1780-1868) may well have been the Laing at Mackintosh's. The three entries at Joseph Johnson's (the last after his death but at his shop at St Paul's) may have referred to William Laing DNB 1764-1832 bookseller & publisher. He lived in Edinburgh and travelled abroad, the DNB mentions his sons and the br may have stood for bookseller (see Hayes, Major & Williams), or for brother.