Alexander Colville, 7th Lord Colville of Culross

Colvill came to Canada during the summer of 1757 with the rank of Captain R.N., in command of the 70-gun HMS Northumberland, which formed part of Vice-Admiral Holburne's fleet ordered to attack Louisbourg.[1] The attack was called off due to the strength of the French fleet, and because the British squadron had been caught and scattered by a September hurricane.[1] On 14 November 1757, Colville assumed command at Halifax with the rank of Commodore as instructed by Holburne.[1] He remained in Halifax over the winter flying his broad pendant in the Northumberland (Capt. Henry Martin, R.N.).[1] On 19 March 1758, Rear-Admiral Sir Charles Hardy arrived at Halifax from England and took over the squadron with instructions from Vice-Admiral Edward Boscawen to blockade Louisbourg.[1] Colville reverted to Captain and re-assumed command of the Northumberland in which he served under Boscawen at the successful Siege of Louisbourg.[2] He returned to England with Boscawen, spent the winter there, and came out to Louisbourg again in the spring of 1759, arriving on 14 May still in command of the Northumberland.

He served at the siege of Quebec as part of Rear-Admiral Philip Durell's force of great ships which patrolled the Gulf of St. Lawrence during the campaign. On 16 October 1759, Colville was appointed by Vice-Admiral Charles Saunders, to the position of Commander-in-Chief in North America with the rank of commodore.[1] He spent the winter at Halifax, flying his broad pendant in the Northumberland, (Capt. W. Adams). In April 1760, he led his squadron to Quebec to find that a small force under Captain Swanton on HMS Vanguard had relieved the British garrison which was under attack by 11,000 French troops commanded by General Lévis. Colville remained in St. Lawrence until early October when, observing that Vaudreuil surrendered Canada to General Amherst, he dispersed the ships and returned to Halifax, sailing from the Île d'Orléans on 13 October and arriving in Halifax 24 October. Next day, HMS Greyhound arrived with Admiralty instructions for Swanton to relieve Colville as commander-in-chief, with the rank of commodore. Swanton had been instructed by Colville to escort the transports to England as soon as the French prisoners were on board—a date estimated to be 20 October. The Greyhound was therefore sent back to the St. Lawrence to look for the Vanguard with instructions to return to England if the latter had sailed. Colville reported that he would carry on as Commander-in-Chief until relieved. Swanton was not found and Colville spent his third winter in command at Halifax, still a commodore and still in the Northumberland.

He remained as commander-in-chief over the winter of 1761/62. On 25 June 1761,[3] he participated in the "Burying the Hatchet ceremony" that was held at Governor Jonathan Belcher's garden on present-day Spring Garden, Halifax, in front of the Court House. The ceremony ended seventy years of warfare between the Mi'kmaq and the British.

He went to the relief of St. John's, Newfoundland, in August 1762. Finally he got back to England in the autumn of that year and was promoted Rear-Admiral of the White on 21 October 1762.[1] In January 1763 he took over from Rear Admiral Philip Durell as Port Admiral at Plymouth.[1]

After less than a year in the United Kingdom Colville was again appointed to the North American Station in June 1763.[1] He sailed in HMS Romney on 31 August 1763 and arrived in Halifax on 13 October.[1] He remained there for the next three years thus establishing a record for command of the station. Little of importance occurred during these years and the Admiral's dispatches report that his main concerns were smuggling and desertion.