Knox Co., Maine.

1894

J.H. Stuart & Co.

1:222k

West Penobscot Bay

1881

1:80k

Knox Co., Maine.

1885

George N. Colby & Co.

1:222k

East Penobscot Bay

1910

1:40k

Approach to Penobscot Bay

1942

C&GS

1:40k

Approach to Penobscot Bay

1915

C&GS

1:40k

East Penobscot Bay

1907

1:40k

St. George River and Muscle Ridge Channel

1946

1:40k

Penobscot Bay

1905

1:125k

Penobscot Bay

1905

1:125k