Americký monitor Canonicus,1863

The first Canonicus, a single-turret monitor, was launched
1 August 1863 by Harrison Loring, Boston, Mass., and commissioned 16
April 1864 at Boston.

Decommissioned to reserve 30 June 1865. Renamed Scylla, 15 June 1869, then Canonicus,
10 August 1869. May have been overhauled during 1869-1872.
Recommissioned 22 January 1872 and operated with the fleet, but was
frequently placed out of commission for short periods. Decommissioned to
reserve 1877. Retained in reserve for use as a display at the 1907
Jamestown Exposition; was cleaned up, towed to the Exposition and placed
on display, but was not recommissioned or made operable.