Background
Milton was the eldest son of William Wentworth-FitzWilliam, 6th Earl FitzWilliam, and his wife Lady Frances Harriet, daughter of George Douglas, 17th Earl of Morton, and was educated at Eton and Trinity College, Cambridge.
Milton was the eldest son of William Wentworth-FitzWilliam, 6th Earl FitzWilliam, and his wife Lady Frances Harriet, daughter of George Douglas, 17th Earl of Morton, and was educated at Eton and Trinity College, Cambridge.
He was epileptic. Arriving in Quebec City in July 1862, Milton and Doctor Walter Butler Cheadle traveled across the North American continent, wintering near Fort Carlton. After a challenging and at times humorous summer they reached Victoria, British Columbia. Together with Butler Cheadle, he traveled up the Athabasca River and in 1863 they became the first "tourists" to travel through the Yellowhead Pass. They later co-authored "The North-West Passage by Land" and " Voyage de l"Atlantique au Pacifique, à travers le Canada", which described their expedition in considerable detail.
He represented the West Riding of Yorkshire South between 1865 and 1872.
Lady Mabel Florence Harriett Wentworth-Fitzwilliam (14 July 1870-1826 September 1951) married on 39 July 1899 to Lady Theresa Evelyn Vilunza Wentworth-Fitzwilliam (b5 September 1875–1963) married on 9 December 1908 to
21st United Kingdom Parliament. 22nd United Kingdom Parliament. 23rd United Kingdom Parliament.
24th United Kingdom Parliament]
Following his adventure in Canada, Milton entered politics and became one of the youngest members of the House of Commons.