Thank you very much for doing this research! I have actually looked at these records as a possible lead in the past. I abandoned it simply because the birth dates were a year apart and in different months and days. All of our family records that were recorded in family Bibles and elsewhere specifically list his birth date as October 10th 1843 or 1845. Was it common for people in such a situation to be mistaken about their birthdays? I will definitely look at this lead as it is certainly a possibility. Most of my closer DNA connections point towards Andreas and Lezayre, but there are a couple Radcliffe trees showing links to Malew.
Regarding the Corlett family with the step-son. I did find a record of a James Corlett in the 1861 Lezayre Census (age 16). He is listed as a man servant living in a home with Radcliffes. I wonder if it is the same James Corlett. Would it also be possible that he changes his name to Radcliffe after serving in that household? Just thinking outside the box...
Another interesting find is a James Radcliffe that I found in the 1871 Bride Census. This James is 29, and he is listed as a "Farm Servant Indoor" with a number of other servants working for the Crye family. The earliest record of my James residing in the USA is 1872 where he is married in Philadelphia, Pennsylvania.
I appreciate all of your help!