Collection search - Map of the phosphate district Ottawa county, Quebec, shewing the position of the most important mines and mining locations by Ed. J. Rainboth, C.E., D. & P.L. Surveyor, compiled from corrected plans & actual surveys. Entered according to Act of the Parliament of Canada, in the year 1891, by Ed. J. Rainboth, at the Department of Agriculture. [cartographic material]