| The Annals of San Francisco by Frank Soulé, John H. Gihon, James Nisbet. 1855. |
Samuel Whittaker and Robert McKenzie were hanged by San Francisco's 1851 Committee of Vigilance for "burglary, robbery and arson." On 24-August-1851, members of the committee took the men from their cells in the county jail on Broadway and hanged them outside the windows of the committee's rooms on Battery Street.