I know that you posted your request for help with finding Cambridges two years ago. Did anyone ever reply?
I have traced my Cambridge ancestry back to 1640. It comes as no surprise that all of my Cambridge's lived in villages around the now city of Cambridge in England. I think most Cambridge's eminated from there. The first of them to come to North America was my great grandfather John James Cambridge who arrived in Toronto,Ontario, Canada in 1868.
Official records of births, deaths, marriage and census were not mandated in law until 1840 in England. I dont know when they started in the U.S. The 1st census in Canada was in 1850. Can you find Cecil in any of the U.S. census's? Was he born in the U.S.? If you can find him in one of the census's you can also then find his parents and from what state etc.
Contact me if I can be of any help.
London, Ont., Canada