Thanks Dob, Woz, KeyBd ... It appears they did stay in England after all, and that is at least that part of the puzzle sorted, and for that I am grateful -- Thanks much!
What started this problem was determining if there was a familial relationship between Alfred Holden and one or the other of the wedded pair that he and wife Sophia were witnessing for in Sheffield, Dec of 1838.
Intuitively I suspected that it may be Alfred Holden who was familialy related to the witnessed-for groom in Dec 1838 - the groom being a certain John Glossop, b. 1816, Sheffield, and per the John Glossop marriage cert., was the son of a certain George Glossop. Per the IGI the only George Glossop I found who had a son John born in 1816 in Sheffield, was the George Glossop who married a certain Elizabeth Sarah
Houlden in Sheffield in 1809.
With that, I tentatively assumed a familial surname correlation between Alfred Holden and Elizabeth Sarah (Houlden) Glossop.... as in: maybe Alfred Holden was a nephew of Elizabeth, and hence may have been John Glossop's cousin on his maternal side.
It gets better (or worse) .... All of this to prove or disprove a stipulation that apppears in a 1934 souvenir publication in Sullivan County, Pennsylvania, USA (of flipping all places) which states: "John (aka Jack) Glossop was the son of Mary Glossop..." -- a claim which I am now more or less disputing, as I am suspecting that Mary Glossop was more likely a marital in-law of the above George Glossop, i.e, George Glossop's sister-in-law, and hence an aunt of George's son John Glossop - he being the guy married in in Sheffield in Dec. of 1838, and for whom Alfred Holden was a witness.

Mind-bending to say the least!
Mike