He was also Yeoman of the Guard to George II., and in 1745, according to Chauncey, raised a regiment at his own expense to serve against the Scotch rebels; and he had such influence in Cornwall that 6,387 persons joined an association, the members of which bound themselves to appear armed in the best manner they could, under his command, to defend the King and the Government. Mrs. Thomson, in her 'Memoirs of Viscountess Sandon,' tells us how the second Viscount's wife, H. C. M. Russell, _née_ Smith, was in desperate straits to get herself appointed a Lady of the Bedchamber, and wrote the most pressing letters to Mrs. Clayton on the subject. In one she says that she could not sleep a wink all night for thinking of it! His brother Nicholas went to Corpus Christi College, Cambridge, took holy orders, and on the Duke of Newcastle's visit to the University, as Chancellor, was created a D.D. He was appointed a King's Chaplain, and 'Dean' of Buryan in 1756, Rector of St. Mabyn and of St. Michael Penkivel in 1774, and a Prebendary of Westminster in 1777. The only remarkable thing about him seems to have been his appointment as 'Dean' of Buryan, the exact significance of which dignity it is difficult to discover, though it is said that this 'Deanery' had jurisdiction over three parishes, and the probate of wills therein, and that there were three prebends attached to it; it is not uninteresting to note this tendency in a member of the Boscawen family to 'hark back to their early St. Buryan haunts.[85] His wife, Mrs. Hatton, was, I believe, the widow of a linendraper in Newgate Street. There was another brother, John--a Major-General in the army;--and the 4th son of the second Viscount, the Hon. George Boscawen, was another military member of the family; he was present at the battles of Dettingen and Fontenoy, and represented Truro in Parliament from 1761 to 1764. His daughter, Mary, maid-of-honour to the Princess Charlotte, wrote a memoir of the Princess.