My great grandfather's brother James Henry Greenwood was born 7th January 1848 at his parents' home, 48 Cellar, Medlock Street, Hulme, Manchester.
His parents were Thomas Greenwood 1817-1873 and Bridget Ward 1823-1867.
James Henry Greenwood is on the 1851 census age 3, born Manchester, living at 3 Clegg Court, Hulme, Manchester. His father Thomas is a Broker. The family is father Thomas, mother Bridget, sons Hiram 4 and James Henry 3, and Bridget's (half?) siblings Betsy and John Ward.
After that, I can't find anything about James Henry Greenwood, except a few records that could easily not be him. This whole family can't be found on the 1861 census, I have searched a lot for each of them individually and found nothing. After that, Hiram, my great grandfather, re-appears on the 1871 census living in Salford with an Irish born wife Mary Ann, and two daughters. I have the 1867 birth certificate for his daughter Rebecca and her 1871 death certificate, and reliably traced Hiram after that, and I think I have the correct death record for his mother Bridget in 1867 in Bendix Street, Manchester and his father Thomas is on the 1871 census living with a wife Ann Greenwood in Long Millgate, Manchester, where he died in 1873. I suspect that Ann, born 1826, was Bridget's sister, who Thomas married after Bridget's 1867 death, but I can't find any marriage record.
The total absence of any of them on the 1861 census is odd, combined with absence of a marriage record for Hiram Greenwood and Mary Ann Roche, which was thoroughly checked by somebody better qualified than me and there is no English marriage record for them. Hiram and James Henry could have other siblings that the 1861 census would have showed. I wondered if the whole family temporarily moved to Ireland, or even further afield.
Hiram and his family eventually, after the death in 1871 of their first child Rebecca, moved out to the Charlesworth, Derbyshire area, where his grandmother Fanny and other family members are on the 1861 census, and many other family members are. Hiram's third child Thomas was born in 1874 in Charlesworth, Derbyshire, maybe named after his father who died in 1873.
Maybe clues to what happened to James Henry Greenwood. I can't find any death record that definitely is him.