Musgrave was head of a family that had held property in Westmorland since the time of Henry II, and regularly represented the county from 1340.
In the immediate aftermath of the Gunpowder Plot it became known that Musgrave had caused ‘a great number of windows to be set up in his house containing sundry arms, where he placed for the first coat the arms of England, the second the arms of Scotland, the third of Edward the Confessor, and the fourth his own’; and for this presumption, together with the suspicion that he was a Catholic, he was summoned to explain himself to the Privy Council.
On 13 Jan. 1607 the deputy receiver for Cumberland and Westmorland was robbed of £200 while on his way from Penrith to Kendal by two of Musgrave’s gentlemen-servants and his cousin, Thomas Musgrave of Norton. Investigations revealed that the robbery had been planned at Eden Hall by Musgrave’s youngest uncle, John Musgrave of Catterlen, who was duly hanged.
To affirm his loyalty to James, Musgrave bought the title of baronet in 1611. In 1614 he applied for a pass ‘to travel for three years to attain the languages’.
