Old Block House, Mackinac Island, Michigan - Vintage Postcard

Old Block House, Mackinac Island, Mich 
Back Information: Fort Mackinac on an elevation of 133 feet, overlooks the City. It was removed from the town in 1780 after Pontiac’s Conspiracy and the original stone block houses, erected at that time, are still in their natural state. The picturesque parapets and block houses at the Fort welcome all. An inspiring panorama is obtainable from this point. Mackinaw City is 12 miles distant on Main Land.
Condition: good, has some ink from the stamp as well as some other stain to the front of the postcard 
Time frame: 1930s
Mailed: Posted on July 27, 1939 from Mackinac Island, Michigan with a green 1 cent George Washington stamp 
hand colored
Publisher: John H. Schwegler