King George VI and Queen Elizabeth receive guests during the 1939 Royal Tour of Canada; Prime Minister Mackenzie King is to the right of the King

King George VI and Queen Elizabeth mingle with guests during the 1939 Royal Tour of Canada

King George VI and Queen Elizabeth arriving at Woodstock during the 1939 Royal Tour of Canada

King George VI and Queen Elizabeth review an Honour Guard of World War 1 Veterans during the 1939 Royal Tour of Canada

King George VI and Queen Elizabeth walk along an Ottawa street during the 1939 Royal Tour of Canada

Queen Elizabeth II and Prince Philip laying a wreath at the National War Memorial during their visit to Ottawa to open the 23rd Parliament of Canada

A picture of Queen Elizabeth II taken during her visit to Ottawa to open the 23rd Parliament of Canada

A picture of Prince Philip taken during the Royal visit in which he accompanied Queen Elizabeth to Ottawa to open the 23rd Parliament of Canada

Queen Elizabeth and Prince Philip are carried past the Château Laurier in the royal coach during their visit to Ottawa to open the 23rd Canadian Parliament

Queen Elizabeth followed by Prince Philip, enters the House of Parliament during the Royal Visit in 1957

Queen Elizabeth and Prince Philip ride in an open touring car during the Royal visit to Ottawa in 1957

Queen Elizabeth inspects an honour guard of Veterans at a ceremony in Ottawa during the 1957 Royal visit

Queen Elizabeth and Prince Philip pose with diplomatic personnel at an embassy function during the 1957 Royal Visit

Prince Philip signs documents in the presents of embassy officials during the 1957 Royal visit to Ottawa with Queen Elizabeth

Queen Elizabeth, seated between Prince Philip and Prime Minister of Canada John Diefenbaker, poses with members of the Federal Cabinet

Queen Elizabeth and Prince Philip in Ottawa during the 1957 Royal visit to open the 23rd Parliament of Canada

A picture of Queen Elizabeth and Prince Philip taken during their visit to Ottawa to open the 23rd Parliament of Canada

Queen Elizabeth, Prince Philip and Prime Minister of Canada John Diefenbaker attend an official state banquet during the 1957 Royal visit

Her Majesty Queen Elizabeth II is greeted by Prime Minister of Canada John Diefenbaker during th 1957 Royal visit to Ottawa

Queen Elizabeth, standing between Prince Philip and Prime Minister of Canada John Diefenbaker, greets a guest during an official reception

Queen Elizabeth and Prince Philip preside over the opening of the 1st session of the 23rd Parliament of Canada

Queen Elizabeth II opens the 1st session of the 23rd Parliament of Canada during her Royal visit in 1957

A closeup of Queen Elizabeth and Prince Philip during the ceremony to open the 1st session of the 23rd Parliament of Canada

United States President Dwight Eisenhower addresses the crowd during the opening ceremonies for the St. Lawrence Seaway as Prince Philip looks on

Queen Elizabeth examines a model of the new Queen Elizabeth Hotel and Canadian National Railways office complex during her 1959 Royal Tour

Queen Elizabeth and Prince Philip disembark from their limousine during the 1959 Royal Tour of Canada

Queen Elizabeth and Prince Philip in Montréal during the 1959 Royal Tour of Canada

Queen Elizabeth in tour car during the 1959 Royal Tour of Canada

Queen Elizabeth during the 1959 Royal Tour of Canada

Queen Elizabeth and Prince Philip listen attentively to a presentation during the 1959 Royal Tour of Canada

Queen Elizabeth and Prince Philip are greeted as they disembark from the HM Yacht Britannia during the 1959 Royal Tour of Canada

Queen Elizabeth and Prince Philip are received by dignitaries after disembarking from the HM Yacht Britannia during the 1959 Royal Tour

Queen Elizabeth and Prince Philip ride in an open limousine during the 1959 Royal Tour of Canada

Queen Elizabeth addresses the crowd during the opening ceremony for the St. Lawrence Seaway as Prince Philip and President Eisenhower look on

Queen Elizabeth and Prince Philip accompanied by Canadian Prime Minister John Diefenbaker, United States President Dwight Eisenhower and their wives on the St. Lawrence Seaway

Women railway workers tending Canadian National Railways steam locomotive no. 6060 during the Second World War

Taking water aboard a steam locomotive

Canadian National Railway workers cleaning a locomotive

Workers fill the water tank of Canadian National Railway steam locomotive no. 6302

A Canadian National Railway lineman filling the water tank of a steam locomotive

Taking water into the tank of Canadian National Railways steam locomotive no. 6182

Canadian National Railways employee cleaning a passenger car

A firefighting tank car in use

Canadian National Railways official using a signograph machine to sign cheques

Canadian National Railways office staff using sortergraphs to organize express accounts

Locomotive engineer testing brakes on Canadian National Railways steam locomotive no. 6208

Loading blocks of ice into the air-conditioning unit of a Canadian National Railways passenger coach

Canadian Northern Railway Vice President A.J. Mitchell