Hi

Jeremiah does appear to have gone "walk about" by 1891, the 1901 entry in Chepstow Workhouse "may" be him ( or it may not ). There is a true Jeremiah Welsh of Chepstow who shows from 1861 - 1891, but of apparent different age.

Charlotte is recorded as Wife / married but I could not see Jeremiah ( i will go back and recheck the image) there is no "Head" to the household - save James Harris which leads to the index error. My reading is that Charlotte has taken rooms in the James Harris house.