Lower Dam and Lower Dam Hydro Plant, St. Anthony Falls, designed by William de la Barre, c.1898.

Newly constructed Lower Dam Hydro Plant, designed by William de la Barre, December 9, 1896.

West side canal, engineered by William de la Barre, under construction, c.1890. Photographer: Henry R. Farr.

Photograph of the Washburn A Mill, designed by William de la Barre, c.1882. Photographer: Henry R. Farr.

Photograph of William de la Barre at a writing desk, c.1875.

Photograph of William de la Barre in overcoat and hat, c.1885. Photographer: Stafford and Company.

Thomas Lowry monument, intersection of Hennepin and Lyndale avenues, Minneapolis.

Dedication of Thomas Lowry memorial, Minneapolis, 1915.

Thomas Lowry’s private streetcar, exterior, c.1912.

Thomas Lowry’s country estate in Monticello, Minnesota, 1910.