The Geological Socieity of America has a nice Series of biographies of notable geologists in history called Rock Stars (*sigh*). This entry by Charles H. Smith, a retired geologist from the Geological Survey of Canada, covers Sir William Edmond Logan:
Sir William Edmond Logan, Father of Canadian Geology: His Passion Was Precision.
This is an Adobe Acrobat File.
For any of my EOSC 311 students – this entry is relevant to Module 2.