Siskiwit Bay

1985

1:100k

Passage Island

1895

1:63k

Passage Island

1895

1:63k

Passage Island

1895

1:63k

Todd Harbor

1985

1:100k

Todd Harbor

1985

1:100k

Isle Royale, Michigan.

1936

Upper Peninsula Development Bureau

Lake Superior Including Isle Royale Michigan

1946

U.S. Lake Survey

1:120k

North West Coast Oflake Superior From Grand Portage Bay to Great Shaganash Islands Including Isle Royal Michigan

1905

U.S. Lake Survey

1:120k

Nautical Chart of Isle Royal, Lake Superior

1871

Corps of Engineers

1:30k