(December 29, 1863 – February 22, 1931) was president of the San Antonio Academy of Medicine and bacteriologist for San Antonio, Texas.
[1] His medical interests in mosquitoes as disease vectors led him to appreciate bats as a way to reduce mosquito populations.
[2] He was born on December 29, 1863, in San Antonio, Texas to Martin Hifield Campbell (1824–1874) and Dolores Barrera (1829–1890).
In 1925 he published Bats, Mosquitoes, and Dollars.
[3] He died on February 22, 1931, in San Antonio, Texas.