The Colonelcy was conferred on the Earl of Plymouth, by commission dated the 15th of July, 1685, and the Lieut.-Colonelcy on Hugh Sunderland, an officer of experience, who had been Major of the Royal Dragoons since 1683. The FOURTH HORSE were armed and equipped as CUIRASSIERS.[9] The men wore hats with broad brims, bound with silver lace, turned up on one side and ornamented with green ribands; scarlet coats lined with green shalloon, and high boots made of jacked leather; they had also scarlet cloaks lined with green, and green horse-furniture embroidered with white, and ornamented with the King's cypher and crown. Their cuirasses were pistol-proof, and they had also iron headpieces called potts. Their weapons were a sword, a pair of pistols, and a short carbine; and, thus equipped, these loyal yeomen had a formidable and warlike appearance. In a few weeks after the regiment was formed, it marched into quarters in Buckinghamshire (viz., to Amersham, Aylesbury, and Marlow), and, having been instructed in the plain and simple exercises practised at that period, it was reviewed on the 20th of August by the King on Hounslow Heath, and again on the 22nd of that month.
After these reviews the FOURTH HORSE marched into winter quarters at several towns in Gloucestershire; and it is a curious particular in the annals of the regiment, that the first service it was called upon to perform was enforcing obedience to an Act of Parliament which prohibited the cultivation of tobacco. The increased consumption and high price of this article had induced several landholders to cultivate it on their farms, in violation of the law, particularly at Winchcomb and the villages in that neighbourhood. One troop was stationed for a short time at Winchcomb expressly for the purpose of preventing the cultivation of this herb; and when the men left that town the following paragraph appeared in the order for their march: 'Our further will and pleasure is, that you cause parties to be sent, once at least in every week, to our town of Winchcomb and places adjacent, who are hereby ordered to destroy all plants, seeds, and leaves of tobacco which they shall, upon the strictest search, find planted or growing contrary to the Act of Parliament.'[10]