From the Plaque:
R. B. Taylor, George L. Joy,
Samuel Merrill, A. S. Garretson, and Adolph Rimpau, having
purchased lands of La Sierra Rancho of Bernardo Yorba and the El Temescal grant of Leandro Serrano on May 4,
founded the citrus colony and town of Corona.
This tablet is placed by the 20-30 Club of Corona. May 3, 1936