Straits of Mackinac with the approaches there to from Lakes Huron and Michigan and the entrance by the detour passage to the St. Mary's River.
        
        Scale: 1:120,000. Chart with sailing directions etc. Label: Buffalo Sept. 20 1866 presented to the HBM Ship Pylades.
              
      
    Object Details
| ID: | G247:6/2 | 
|---|---|
| Collection: | Charts and maps | 
| Type: | Chart | 
| Display location: | Not on display | 
| Creator: | Bureau of Topographical Engineers; Boschke, Albert Siebert, Selmer | 
| Places: | Mackinac Bay; Lake Michigan Lake Huron | 
| Vessels: | Pylades | 
| Date made: | 1849; 1854; 1849 1854 | 
| Credit: | National Maritime Museum, Greenwich, London | 
| Measurements: | Sheet: 114 cm x 70.5 cm |