Don't give up Ms. Ann. I know this is terribly vague and sounds down right weird, and probably doesn't apply in this case (Is that sufficient caveats yet?) BUT: For what's it worth, for some strange reason many people in the 19th century associated with the name Rockett have other names or aliases. I have run into this on numerous occasions (in more than one state) working in genealogy, but have never been able to figure what's going on with it. Perhaps Mr. Alan Whitehead would check when Mr. Rockett joined and other info about him so it could be checked against Mr. Rockwood. If nothing else, it will eliminate Mr. Rockett, and we can move on.

Perhaps some of the pros (Mr. George Martin, one of the two Mr. Bryants, and a few others) will note your post and wade in.