An overview of North American mammals in three parts, assembled from two previously published sources. Parts 1 & 2 are continuously paginated. The work
consists first of a reprint of the Reports upon the Mammals that appeared, in the Pacific Railroad Survey Reports, Vol. VIII, and second in the U.S. and Mexican
Boundary Survey Reports, Vol. II, pt. 2”. Thus, the work incorporated sheets that were either remaindered or picked up for free from publications paid for by the U.S. government, and combined in single volume issued by a private publisher for profit.
Digital facsimile from Biodiversity Heritage Library at this link.