In July 1793, Alexander Mackenzie (1764-1820), fur trader and explorer, was the leader of the first expedition to cross the North American continent from the Atlantic to Pacific north of Mexico.
At the western terminus of his journey point he inscribed "Alex MacKenzie / from Canada / by land / 22d July 1793" on a rock using a reddish paint made of vermilion and bear grease and turned around to return to "Canada".The rock still bears these words which were permanently inscribed later by surveyors:
The Alexander MacKenzie commemorative stamp was issued on June 25, 1970.
National Archives of Canada
First Day Covers
Canada Post Office Publicity First Day Cover
Mailed to the Austrian Philatelist, Vienna, Austria
Insert written in German
Shering
Jackson
Overseas Mailers
Royal Philatelic Society
Rosecraft
H & E
Uncacheted
To Razaieh, Iran
12 cents UPU surface letter rate
Elliot-Marion
Cole Cover
David Pritchard
Usages
Domestic Letter
Toronto local correspondence, July 14, 1970
6 cents domestic letter rate
International Surface Post Card
Toronto to Zagreb, Yugoslavia, August 1970
7 cents UPU surface post card rate
Shortpaid 1 cent and taxed 2/12 :
The Yugoslavian post office charged 0.40 dinar
(The tax fraction system is explained HERE)