Mark Mattson has collected 22 watermarks.
Black River, Ontario
Tanya Clark
Charles River, Massachusetts
Kathleen Behan
Genesee River
Joel Helfrich
Hague Lake
Forrest Berman-Hatch
James Bay, Ontario
Joseph Boyden
Kashagawigamog Lake, Ontario
Michael Adamson
Lake Erie, Ontario
Sarah Harmer
Lake Huron, Ontario
Sarah Harmer
Lake Michigan, Michigan
Sarah Harmer
Lake of Bays, Ontario
Carolyn Maze
Lake of the Woods, Ontario
Tzeporah Berman - Camp Onakawana
Lake Ontario, Ontario
Gord Downie
Lake Ontario, Ontario
Lawrence Scanlan
Lake Ontario, Ontario
Nora Osbaldeston
Lake Ontario, Ontario
Sarah Harmer
Lake Superior, Ontario
Sarah Harmer
Lake Temagami, Ontario
Gord Miller
Ottawa River, Ontario
Catherine McKenna
Shuswap Lake, BC
Shane Fennessey
St.Lawrence River, Ontario
Ingrid Mattson
St.Lawrence River, Ontario
Soumayya Aatek
Victoria Harbour, Pacific Ocean
Liesa Norman - Camp Onakawana