At his brother's suggestion, Hope-Weir took with him the young architect Robert Adam, who had been advising Lord Hope on the decoration of Hopetoun House.
[2] The pair met up in Brussels in November 1754, and travelled through France and Italy together, on the typical grand tour route, taking in Lyon, Marseilles, Nice and Genoa.
Although they remained civil whenever they met, Adam wrote in a letter that Hope was a "poor, vain, affected, childish coxcomb".
[4] After Easter, Hope-Weir went on to Naples, taking with him the minor Scottish painter and art dealer Colin Morison (1732–1810) in Adam's place.
He returned home in late 1755 with his son, travelling via Frankfurt due to the political situation in France, and arriving in Britain in May 1756.