Robert Bruce, whose elder brother, Thomas, the 2nd Earl of Ailesbury, became a Jacobite exile, joined the Queen’s Royal regiment of Horse in 1688 as a volunteer against the Prince of Orange.
[I] am in great fears that he [Carleton] has let slip his opportunity and through want of resolution ... will fail of what everybody thought at my Lord Sunderland’s death he could not fail of, but by his own fault, the consequences of which will be a disadvantage to the public, a very great one to himself and will certainly be fatal to me. You may easily judge what temper I must be in on such occasion, being entirely in the dark and uncertain what to do ... all I have to hope is that I judge ill that what must befall me by it makes me apprehend more than really is ... I will endeavour to see him in a day or two for I ... think it would be of some use to you to know his opinion concerning your going into Yorkshire, since the common discourse is that it is in the north, if anywhere, that a rising was to be.
HMC 15th Rep. VII, 226-7.
On George I’s death Bruce took Lord Ailesbury’s ‘most respectful compliments’ to the new King.
I am extremely surprised that you should apply to Sir Robert Walpole in the manner you have done without first having my approbation ... I cannot, nor will not, agree to what you propose, nor would not do it for all that Sir Robert is worth.
HMC 15th Rep. VII, 231.
For this reason, presumably, he was not nominated by Lord Bruce for Bedwyn at the 1727 election, though Lord Ailesbury himself was ‘troubled ... very much’ at this omission.
I was on Tuesday last with Sir Robert Walpole as you thought it proper for me to do. He said that as to what your Grace had spoken to him about me he could not possibly do anything in it, and then said in a very obliging manner, can I serve you in anything else? My answer to that was that there was a vacancy in Parliament [at Tregony] by the death of Mr. Smith. He said that was so and that he was under no engagement to anybody, so he believed he could do it.
HMC 15th Rep. VII, 233.
He did not get Tregony and died 19 May 1729.
