William Lloyd began his career as a collector and student of birds in western and southeastern Texas in 1880, after having come to Texas in 1876. For some time he lived in San Antonio (the information is fragmentary in many details), and in this period (1879) he first emerges as the discoverer of cement-rock near San Antonio, which resulted (1880) in the first cement manufactory west of the Mississippi River.
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Geiser, S. W.
"William Lloyd, British-American Natural-history Collector in Texas,"
Field and Laboratory: Vol. 24
Available at: https://scholar.smu.edu/fieldandlab/vol24/iss4/3