Charles Fitzcharles, popularly (and dismissively) known as Don Carlos, was brought up in the Spanish Netherlands by his mother, the daughter of a royalist country squire who subsequently married (c.1667) Sir Edward Green. Apparently ignored by Charles II for much of his early life, Fitzcharles charmed his way into the court and the king’s affections after arriving in England in 1672. For a while it seemed that he had eclipsed his older half-brother, James Scott, duke of Monmouth, in the king’s favour. In October 1672 it was rumoured that he was to be given command of a regiment of foot and an income of £10,000 a year, but rumour proved to be inaccurate. He actually received a pension of just £2,000 a year, a relatively insignificant sum when compared to Monmouth’s £8,000 a year.
Although the letters patent creating Fitzcharles earl of Plymouth were not issued until July 1675, the warrant was issued on 31 Aug. 1674 and the intention was so well known that he and others used the title even before that date.
In the summer of 1677 Plymouth went to serve at the siege of Charleroi but his departure was delayed until his inability to afford a suitable equipage was eased by an infusion of an additional £5,000 from the king.
Plymouth was noted as being under age at a call of the House on 16 Feb. 1678. He took his seat on 8 May 1679, in the second session of the first Exclusion Parliament, in consequence of a writ of summons dated 7 May 1678, which was probably his 21st birthday. He then attended every remaining day of the session, just under 30 per cent of the whole. Despite his close relationship with Danby, it is far from clear whether he supported his father-in-law. In April 1679 he referred, without explanation, to the displeasure of Lady Danby, who blamed him for contriving Danby’s ruin.
Although the fall of Danby threatened to damage Plymouth’s career at court, it soon seemed likely that this would be more than offset by the effects of Monmouth’s fall from favour. In December 1679 Plymouth was tipped to become master of the horse in Monmouth’s place.
