Thomas George Johnston was a Canadian

Canada

Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...

 physician and politician.

Born in Sarnia

Sarnia, Ontario

Sarnia is a city in Southern Ontario, Canada . It is the largest city on Lake Huron and is located where the upper Great Lakes empty into the St. Clair River....

, Canada West, was educated at the public and grammar schools of Sarnia. He graduated in medicine from McGill College and took up his father's practice in Sarnia. He was Mayor of Sarnia for two terms (1896 and 1897) and Chairman of the Board of Health and a School Trustee. He was first elected to the Canadian House of Commons

Canadian House of Commons

The House of Commons of Canada is a component of the Parliament of Canada, along with the Sovereign and the Senate. The House of Commons is a democratically elected body, consisting of 308 members known as Members of Parliament...

 for Lambton West

Lambton West

Lambton West was a federal electoral district represented in the Canadian House of Commons from 1883 to 1968. It was located in the province of Ontario...

 in a 1898 by-election. A Liberal

Liberal Party of Canada

The Liberal Party of Canada , colloquially known as the Grits, is the oldest federally registered party in Canada. In the conventional political spectrum, the party sits between the centre and the centre-left. Historically the Liberal Party has positioned itself to the left of the Conservative...

, he was re-elected in 1900

Canadian federal election, 1900

The Canadian federal election of 1900 was held on November 7 to elect members of the Canadian House of Commons of the 9th Parliament of Canada. As a result of the election, the Liberal Party, led by Prime Minister Wilfrid Laurier, was re-elected to a second majority government, defeating the...

 and 1904

Canadian federal election, 1904

The Canadian federal election of 1904 was held on November 3 to elect members of the Canadian House of Commons of the 10th Parliament of Canada...

. He served in the Canadian militia and participated in the Fenian raids

Fenian raids

Between 1866 and 1871, the Fenian raids of the Fenian Brotherhood who were based in the United States; on British army forts, customs posts and other targets in Canada, were fought to bring pressure on Britain to withdraw from Ireland. They divided many Catholic Irish-Canadians, many of whom were...

between 1866 and 1871. He died in office in 1905.