This is not a source for the 42nd directly but weren't they brigaded with the 55th at Ticonderoga for a time? Perhaps the following will be helpful:
Captain Alexander Monypenny, Orderly Books, 23 March 1758-September 1759. Monypenny served in the 55th Regiment of Foot. Mss. in Fort Ticonderoga collections [25 March-5 May 1758, FTA #M-2156; 6 May-20 June 1759, #M-2164; 20 June-14 July 1759, #M-2162; 15 July-3 August 1759, #M-2170; 4 August-5 September 1759, #M-2161]. Published in The Bulletin of the Fort Ticonderoga Museum, 15 July 1759-3 August 1759, vol. II no. 6 (July 1932), pp. 219-251. For acquisition of the Monypenny Orderly Books, see Fort Ticonderoga Scrapbook, vol. III, p. 48 [April-May 1920].
It is available at the Fort Ti bookstore.
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