This marker indicates the location of a building called the Labor Temple, which, from the early 1900s to 1948, was once the heart of San Jose's labor movement. Sometime between 1901-1903, Harry Ryan, the local labor leader, and author Jack London, founded the Labor Temple. It was an informal organization at first but it became official in 1911. London finished his novel the Call of the Wild and wrote parts of another book, Sea Horse, here (in Harry's office). The building was demolished in the 1950s.