Yes, I think that Robert Harvey Stalla was the Robert Hervey Stally from All Saints, Long Stanton, Cambridge, although it is not 100% proven. [On the 1900 census, his daughter gave her father's birthplace as Cambridge, England]. I have never found Robert [or his parents] on any passenger list. I have no record of his parents in the US. The surname got variously mangled - Stalla, Stally, Stalley, Staley, Tally, etc., but Stalla appears to have been the version used by Robert himself and by his widow until her death. In later generations, the name was changed to Stella.
Robert H. Stalla married Jane Logan [sister of my gg-grandfather] in New York in about 1838ish. They had six children, all born in Brooklyn.
1840 - Stalla, Robert H., laborer, 36 Henry Brooklyn, NY. [General & business directory for 1840-41. Brooklyn: T.& J.W.Leslie & W.F.Chichester,1840.]
1840 census - Robert Stalla., Brooklyn, Kings County, New York; 1 male 30-40; 2 females <5; 1 female 20-30; 1 female 70-80
1850 census - Robertt H. Stalla, 4th Ward, Brooklyn, New York; age 42; married; porter; born in England; with wife and children Elizabeth, Mary A., William, Joseph, and Jane
1850-51 - Stally, Robert H., porter, 130 Adams Street. [Hearne's 1850-51 Brooklyn City Directory.]
Robert apparently died before the 1855 NY census but I have found no record of his death; his wife was recorded as a widow at that time. She appears in Brooklyn city directories or censuses in 1855, 1865, 1867, 1868, 1870, 1871, 1875, 1876, 1878, 1880, 1881, 1883, 1884 and 1885 - usually with the surname spelled Stalla. She died in 1888 and is buried in Green-Wood Cemetery, Brooklyn under the surname Stella.