A superb early "outsider" travelogue composed by Lieutenant Henry Augustus Wise of the United States Navy. He also wrote under the moniker, Harry Gringo, and is a particularly lively, original [by that I mean, he exaggerates a good bit] author, discussing in detail his travels and the people of South and Central America, Mexico, California, even a sting on Hawaii. He participated in the Donner Party situation and seems to be source "A" for some of the most lurid details, many of which are now considered apocryphal. See HERE.

Significant content from the Mexican War, including accounts of the battles of San Pascual, San Gabriel and La Mesa, Fremont, Monterey, the town of Yerba Buena, the blockade of Mazatlan, etc. 

Wise, Lieut. Los Gringos: Or, An Inside View of Mexico and California, with Wanderings in Peru, Chili, and Polynesia. New York. Baker and Scribner. 1850. 453pp.

A good to good - copy, bound in cloth, lightly shaken, with a few signatures forward in the binding, and light to moderate foxing as shown.