Henry Charles Fletcher was born on April 28, 1833, in Marylebone, Middlesex, England.

He was a British military officer, private secretary, and author. In 1850, he obtained a commission as ensign in the Scots Fusilier Guards and as a lieutenant in the army. He saw active service in the Crimea in 1856, and promotion to captain and lieutenant-colonel in 1859. He travelled to Canada with the 2nd Battalion in the Guards brigade at the end of 1861 during strained relations between Great Britain and the United States following the Trent incident. He took the opportunity to see the American Civil War and was present at the battles of Williamsburg, Fair Oaks, and the Seven Days. In 1872, Lord Dufferin was appointed Governor-General of Canada and he chose Fletcher as his private secretary in Ottawa. His chief task was to develop a military spirit in Canada so that the Canadian government might be induced to make adequate provision for defence. He also suggested Canada should train its militia officers in permanent schools. In 1875, he returned to his regiment in England where he was aide-de-camp to the Duke of Cambridge and a justice of the peace in Kent. He lectured to the Royal United Service Institution on the use of colonial forces in imperial wars. He is the author of "The Defence of Canada; a Lecture Delivered at the Literary and Scientific Institute" (Ottawa, 1875); "History of the American War” (3 v., London, 1865–66), and "Memorandum on the Militia System of Canada" (Ottawa, 1873).

In 1863, he married Lady Harriet Marsham (1838–1886). He died on August 31, 1879, in Putney, Surrey, England.

Sir Hugh Fletcher was born on December 9, 1848, in London, England.

He was a geologist, surveyor, and civil servant. He immigrated to Canada with his father in 1860. The son of a mining engineer, he obtained his education at the University of Toronto in 1870. His first practical experience in geology was from his father's work in the gold mines at Tangier, Nova Scotia. He spent most of his career, from 1875 until 1909, on coal measures in Cape Breton Island and Nova Scotia. His work also included the survey of the counties of Cumberland, Colchester, Pictou, Antigonish, Guysborough, Kings, Hants, and a portion of Halifax. He produced numerous maps and reports on geological surveys and explorations of Nova Scotia. In 1950, the Fletcher Geology Club was formed in affiliation with the Nova Scotia Mining Society.

In 1882, he married Christine MacLeod (1862–1892). He died on September 23, 1909, in Lower Cove, Nova Scotia.

James Fletcher was born on March 28, 1852, in Ash, near Rochester, Kent, England.

He was a Canadian entomologist, botanist, and writer. He began work as a clerk at the Bank of British North America in London and was transferred to the Montreal branch in 1874 and the Ottawa branch in 1875. In 1876, he began work as an assistant in the Library of Parliament and discovered an interest in botany and entomology. He established a national reporting system to help identify and control the spread of insects and weeds harmful to agriculture. In 1887, he became the first Dominion Entomologist and Botanist attached to the Central Experimental Farm. He helped set up measures to control the spread of plant diseases and harmful insects from both within and outside Canada. He was a founder of the American Association of Economic Entomologists, now the Entomological Society of America, and a fellow of the Linnean Society of London. He was one of the founding members of the Ottawa Field-Naturalists' Club and a president of the Ottawa Horticultural Society. In 1885, he was elected to the Royal Society of Canada. He contributed articles to scientific journals and bulletins, and he published with George H. Clark, “The Farm Weeds of Canada” (1906).

In 1879, he married Eleanor Gertrude Schreiber (1859–1912). He died on November 8, 1908, in Montreal, Quebec.