In 1743-4, Barry, though a lieutenant in the navy, acted as his father’s secretary in the negotiations between the English Jacobites and the French, and was employed rallying supporters ‘in London and Westminster’.
After the abandonment of the expedition Lord Barrymore wrote to Newcastle, 1 Dec. 1744, to inquire about Barry’s prospects of promotion:
When I had last the honour to pay my respects ... I asked your Grace whether you thought it proper that my son should quit the service in the navy ... You were so good as to tell me you did not think it proper at that time ... I saw Lord Winchilsea who told me he ought to continue in the service and that he would take care no injustice be done to him in the course of preferment, but matters turned out otherways and several have been made captains that were his juniors. I do not trouble your Grace with this in the least to incumber you with the advancement of a person that may be obnoxious but to prevent any malicious insinuations on me or him if he quits the service.
Add. 32703, ff. 449-51.
Newcastle replied advising Barry to remain in the navy, and on 11 Apr. 1745 he was promoted commander.
During the Forty-five Barry was sent to Derby with promises of support from his father and Sir Watkin Williams Wynn but arrived two days after the Young Pretender had left.
In February 1747 Barry visited the Young Pretender at Avignon with a message from his father.
Bred a Jacobite, but an extreme idle man and will attend little. He will live chiefly in Ireland. He has lately married the daughter of Mr. Hyde, knight of the shire for the county of Cork, a true Whig and a worthy man, a relative and friend of mine. What influence this may have on him I know not.
On which Frederick, Prince of Wales, commented: ‘Will I daresay be with us, so old Wills [i.e. chief justice Sir John Willes] assures me’.
Continuing to correspond with the Young Pretender
He died 23 Nov. 1787.
