The San Antonio Land and Irrigation Company Limited represents an economic phenomenon characteristic of the early 20th century: the Canadian and British companies that invested massively in agricultural land and irrigation systems of Texas and the American Southwest. San Antonio, a major Texan center, was surrounded by vast lands that could be made productive through irrigation. This certificate for 10 shares, issued in Canada in January 1912 in the name of J.H. Dunn, illustrates the appeal of American agricultural projects to Canadian investors. Irrigation companies were then seen as promising long-term investments, transforming semi-arid lands into productive farmland. This document is a rare piece of scripophily at the intersection of Texas agrarian history and Canadian investment in the United States at the beginning of the 20th century.