River with 7,000 troops on a plan to retake Quebec City from the British. April 22 – Belgian entertainer Joseph Mervin is said to have given the first demonstration of roller skates, in a performance at the Carlisle House in London, but the stunt ends in disaster. April 26 – Marshal Lévis and his troops land at Saint-Augustin-de-Desmaures, adjacent to Quebec City, and prepares to lay siege to the British occupying force. April 27 – British Army Brigadier General James Murray marches a force of 3,500 men toward Saint-Augustin to confront Marshal Lévis and the French Army. April 28 – British defenders and the French Army clash at the Battle of Sainte-Foy to determine the future control of Quebec. General Murray is forced to retreat after the British suffer 259 deaths and 845 wounded, while the French under Marshal Lévis suffer 193 deaths and 640 wounded. April 29 – Representatives of the remaining Penobscot Indian tribes in Maine and New Brunswick make peace with the British at Fort Pownal in Newfoundland. April 30 – Swiss mathematician Daniel Bernoulli presents a paper at the French Academy of Sciences in Paris in which "a mathematical model was used for the first time to study the population dynamics of infectious disease." May 11 – King Alaungpaya of Burma dies during a retreat from Ayutthaya after stopping at the village of Kinywa while en route to Martaban. His son Naungdawgyi becomes the new King of Burma. May 16 – Three British Royal Navy ships under the command of Commodore Robert Swanton on arrive to break the siege of Quebec before Marshal Lévis can recapture the city from the British. May 17 – Captain Giraudais's French fleet reaches the Gaspé Peninsula of northeast Quebec and captures seven British merchant ships, but Giraudais learns that the British have already preceded him up the St. Lawrence River and diverts to Chaleur Bay at Newfoundland. June 4 – Expulsion of the Acadians: New England planters arrive to claim land in Nova Scotia taken from the Acadians. June 11 – Robert Rogers and his Rangers launch a strike from Lake Champlain against French military posts along the Richelieu River – they strike at Fort Sainte Thérèse and destroy the settlement. June 19 – The British create Cumberland County and Lincoln County in Maine. June 22 – Britain's Captain John Byron, commanding HMS Fame, locates France's Captain Giraudais but runs