[1] In May 1617 he was travelling in France, and met up in Bourges with Henry Erskine, the son of the Earl of Mar and his French-born second-wife Marie Stewart.
One of their companions fell sick, and Morton asked if the doctors had bezoar stones, and they scorned him for believing in such things.
King James wrote to the Earl of Mar from Theobalds on 26 March 1618 asking him take measures to protect Morton's son's inheritance.
In April 1625, when the body of the king was bought from Theobalds, it was noticed that the Earls of Morton and Roxburghe were not in attendance, but had gone to be "merry" at More Park with Lucy Russell, Countess of Bedford.
He extended his home at Aberdour Castle in Fife, with a Renaissance-style east wing, with a long gallery overlooking a formal terraced garden.