James Howarth born 27/9/1844 is on Geni with 1 mother and 2 fathers
Mother - Sarah Clarke - Howarth 1800-1872
Father 1 - Henry (Clack) Clarke [Convict "Admiral Gambier" 1811] died 13/8/1842
Father 2 - Benjamin Howarth, Convict "Florentia" 1830 (1806-1861)
Henry Clarke died 13/8/1842 and James was born two years later on 27/9/1844 so he cannot be his father.