Personal data
Adam Glegg
abt.
Born 1726  
in Marykirk
abt.
Died June 1, 1807  
in London
Mr. Gleg

Merchant and sometime four-time provost of Montrose for a total of 22 years. Possibly the son of John Gleig (1654-1737) and Isobel ? (1683-1761). 

Adam Glegg married (1757) Anne Smith (1738-1811) with whom he had seventeen (!) children.1

Boswell wrote in his Journal of a Tour to the Hebrides that on August 21, 1773, he and Dr Johnson "met Mr Gleg, a merchant here [in Montrose]. He went with us to see the English chapel." The identifiation of "Mr. Gleg" with Adam Glegg is likely if not absolutely certain.

Journal of a Tour to the Hebrides (1785)

Unless otherwise noted, the source for a dated quotation of Boswell's is generally the corresponding volume of the Yale Trade Editions of Boswell's journals.