Orland Underwood is listed on the 1861 census as being a five year old boy born in Bristol, Gloucestershire, and living with his parents George Underwood and Matilda Underwood (nee Lane). This would make his year of birth 1856.
There is no Orlando Underwood with a birth registered in Bristol between 1855 and 1857. However, Orlando is an unusual name and there is an Orlando Underwood whose birth is registered in Clifton, Gloucestershire in 1856.
He doesn’t appear on the 1871 census, when he would have been 15, so it appears he died between the 1861 and 1871 censuses.