The 42nd, or Black Watch, or Royal Highlanders, left America in 1767, and sailed direct for Cork, Ireland. In 1775 the regiment embarked at Donaghadee, and landed at Port Patrick, after an absence of thirty-two years from Scotland. From Port Patrick it marched to Glasgow. Shortly after its arrival in Glasgow two companies were added, and all the companies were augmented to one hundred rank and file, and when completed numbered one thousand and seventy-five men, including serjeants and drummers.

Hitherto the officers had been entirely Highlanders and Scotch. Contrary to the remonstrances of lord John Murray, the lord lieutenant of Ireland succeeded in admitting three English officers into the regiment, Lieutenants Crammond, Littleton, and Franklin, thus cancelling the commissions of Lieutenants Grant and Mackenzie. Of the soldiers nine hundred and thirty-one were Highlanders, seventy-four Lowland Scotch, five English, one Welsh and two Irish.

On account of the breaking out of hostilities the regiment was ordered to embark for America. The recruits were instructed in the use of the firelock, and, from the shortness of the time allowed, were even drilled by candle-light. New arms and accoutrements were supplied to the men, and the Colonel, at his own expense, furnished them with broad swords and pistols.

April 14, 1776, the Royal Highlanders, in conjunction with Fraser's Highlanders, embarked at Greenock to join an expedition under General Howe against the Americans. After some delay, both regiments sailed on May 1st under the convoy of the Flora, of thirty-two guns, and a fleet of thirty-two ships, the Royal Highlanders being commanded by Colonel Thomas Stirling of Ardoch. Four days after they had sailed, the transports separated in a gale of wind. Some of the scattered transports of both regiments fell in with General Howe's army on their voyage from Halifax; and others, having received information of this movement, followed the main body and joined the army at Staten Island.

When Washington took possession of Dorchester heights, on the night of March 4, 1776, the situation of General Howe, in Boston, became critical, and he was forced to evacuate the city with precipitation. He left no cruisers in Boston bay to warn expected ships from England that the city was no longer in his possession. This was very fortunate for the Americans, for a few days later several store-ships sailed into the harbor and were captured. The Scotch fleet also headed that way, and some of the transports, not having received warning, were also taken in the harbor, but principally of Fraser's Highlanders. By the last of June, about seven hundred and fifty Highlanders belonging to the Scotch fleet, were prisoners in the hands of the Americans.

The Royal Highlanders lost but one of their transports, the Oxford, and at the same time another transport in company with her, having on board recruits for Fraser's Highlanders, in all two hundred and twenty men. They were made prizes of by the Congress privateer, and all the officers, arms and ammunition were taken from the Oxford, and all the soldiers were placed on board that vessel with a prize crew of ten men to carry her into port. In a gale of wind the vessels became separated, and then the carpenter of the Oxford formed a party and retook her, and sailed for the Chesapeake. On June 20th, they sighted Commodore James Barron's vessel, and dispatched a boat with a sergeant, one private and one of the men who were put on board by the Congress to make inquiry. The latter finding a convenient opportunity, informed Commodore Barren of their situation, upon which he boarded and took possession of the Oxford, and brought her to Jamestown. The men were marched to Williamsburgh, Virginia, where every inducement was held out to them to join the American cause. When the promise of military promotion failed to have an effect, they were then informed that they would have grants of fertile land, upon which they could live in happiness and freedom. They declared they would take no land save what they deserved by supporting the king. They were then separated into small parties and sent into the back settlements; and were not exchanged until 1778, when they rejoined their regiments.

Before General Sir William Howe's army arrived, or even any vessels of his fleet, the transport Crawford touched at Long Island. Under date of June 24, 1776, General Greene notified Washington that "the Scotch prisoners, with their baggage, have arrived at my Quarters." The list of prisoners are thus given:

"Forty second or Royal Highland Regiment: Captain John Smith and Lieutenant Robert Franklin. Seventy-first Regiment: Captain Norman McLeod and lady and maid; Lieutenant Roderick McLeod; Ensign Colin Campbell and lady; Surgeon's Mate, Robert Boyce; John McAlister, Master of the Crawford transport; Norman McCullock, a passenger: two boys, servants; McDonald, servant to Robert Boyce; Shaw, servant to Captain McLeod. Three boys, servants, came over in the evening."[162]

General Howe, on board the frigate Greyhound, arrived in the Narrows, from Halifax, on June 25th, accompanied by two other ships-of-war. He came in advance of the fleet that bore his army, in order to consult with Governor Tryon and ascertain the position of affairs at New York. For three or four days after his arrival armed vessels kept coming, and on the twenty-ninth the main body of the fleet arrived, and the troops were immediately landed on Staten Island. General Howe was soon after reinforced by English regulars and German mercenaries, and at about the same time Sir Henry Clinton and Admiral Parker, with their broken forces came from the south and joined them. Before the middle of August all the British reinforcements had arrived at Staten Island and General Howe's army was raised to a force of thirty thousand men. On August 22nd, a large body of troops, under cover of the guns of the Rainbow, landed upon Long Island. Soon after five thousand British and Hessian troops poured over the sides of the English ships and transports and in small boats and galleys were rowed to the Long Island shore, covered by the guns of the Phœnix, Rose and Greyhound. The invading force on Long Island numbered fifteen thousand, well armed and equipped, and having forty heavy cannon.

The three Highland battalions were first landed on Staten Island, and immediately a grenadier battalion was formed by Major Charles Stuart. The staff appointments were taken from the Royal Highlanders. The three light companies also formed a battalion in the brigade under Lieutenant-Colonel Abercromby. The grenadiers were remarkable for strength and height, and considered equal to any company in the army. The eight battalion companies were formed into two temporary battalions, the command of one was given to Major William Murray, and that of the other to Major William Grant. These small battalions were brigaded under Sir William Erskine, and placed in the reserve, with the grenadiers and light infantry of the army, under command of lord Cornwallis.