From the plaque:
One of the principal mining
communities in Calaveras County, Murphys was named for
the discoverer of gold on the flat in 1849. The objective
of many immigrants coming over the Sierras by Ebbetts
Pass, Murphys Flat and surrounding mines produced 20,000,000
dollars in gold. Early regulations restricted claims to
8 ft. square. A suspension flume conveying water across
Murphys Creek and drainage race draining the flat were
two outstanding accomplishments of early day miners. The
business portion of town was destroyed by fire August
20, 1859. Joaquin Murieta bandit, is said to have begun
his murderous career here. Calaveras Light Guards recruiting
for Civil War, organized here on May 4, 1861.
Erected and dedicated Dec 1937 by Ruby Parlor No. 46 Native Daughters of the Golden West, Chispa Parlor No. 139 Native Sons of the Golden West.