Duchess of York in the context of "Princess Margaret, Countess of Snowdon"

Mary of Teck (Victoria Mary Augusta Louise Olga Pauline Claudine Agnes; 26 May 1867 – 24 March 1953) was Queen of the United Kingdom and the British Dominions, and Empress of India, from 6 May 1910 until 20 January 1936 as the wife of King George V.

Born and raised in London, Mary was the daughter of Francis, Duke of Teck, a German nobleman, and Princess Mary Adelaide of Cambridge, a granddaughter of King George III. She was informally known as "May", after the month of her birth. At the age of 24, she was betrothed to her second cousin once removed Prince Albert Victor, Duke of Clarence and Avondale, who was second in line to the throne. Six weeks after the announcement of the engagement, he died unexpectedly during a pandemic. The following year, she became engaged to Albert Victor's only surviving brother, George, who subsequently became king. Before her husband's accession, she was successively Duchess of York, Duchess of Cornwall, and Princess of Wales.

A timber slide is a device for moving timber past rapids and waterfalls. Their use in Canada was widespread in the 18th and 19th century timber trade. At this time, cut timber would be floated down rivers in large timber rafts from logging camps to ports such as Montreal and Saint John, New Brunswick. Rapids and waterfalls would, however, damage the wood and could potentially cause log jams. Thus at these locations timber slides were constructed. These were thin water filled chutes that would run parallel to the river. They would usually only be wide enough for a single log and one at a time the logs would be directed down it. The idea is attributed to Ruggles Wright who introduced the first one in 1829 not far from what is today down-town Hull, Quebec, Canada. Later, the slides could often be up to a kilometre in length. They were most commonly found on the Ottawa River system. The Bonnechere River in Eastern Ontario had five chutes along the waterway before emptying into the Ottawa River.

In some areas the timber slide became a tourist attraction, the most notable being the 1.2 km chute bypassing the Chaudière Falls on the Ottawa River in Ottawa. Its most notable visitors are the Duke of York, who later became King George V, and his wife, the Duchess of York Mary of Teck.