With only the bits and pieces that we have, I have to agree that Luke could have been the son of John and Grace. We believe that John died in 1744 at about age 54 so he was certainly young enough to still be producing off-spring. What we don't know is the approximate age of Luke. If he was born between 1835 and 1844 then he would also have been young enough to be moving around (even fathering children); somewhere between the ages of 56 and 65 in 1800. We also know that people generally did not live as long back then as they do today, but I believe we can say without a doubt, that they were generally in much better physical condition and likely lived more active lives into their later years than most of us today. My mother's dad lived to be 85 and the month he died he was still chopping his own firewood and hauling it. At age 75, following my grandmother's death, he sold his home, bought an old truck and camper and simply traveled around the country for many years. He did odd jobs to earn enough money to keep his sightseeing tour going. I know people under age 50 that can't do the labor he did at 85. I also agree that there is not enough proof at this time to make the declaration.