Birds eye view of Lowell, Mass.: 1876 

Lowell 1896 maps 

Lowell Maps

Sanborn Fire Insurance Map from Lowell, Middlesex County, Massachusetts – 1892

Views of the canal are on Images 1, 11-14, 16, 19, 20-22, 24-26, 28, 29, 31, 32, 35, 36, 38, 39, 46-48, 50 and 52.