He was a Catholic, as the English ambassador William Asheby noted in November 1589, on the death of his uncle Mungo Graham, Master Household to James VI.
[1] On 31 January 1595, in a feud following the death of his kinsman John Graham of Hallyards, he fought with James Sandilands on the Royal Mile.
In the confusion, a rumour spread that King James was besieged in Holyrood Palace.
[2] Sandilands' brother-in-law William Crauford, brother of the laird of Carse was killed.
[4] Mayerne offered to write a recipe to treat his wife's eyes in 1616.