the ann callister in the above is probably a mis-entry for isabella callister and the entry corresponds to a william morrison found in 1841c thus there appears to be no obvious match unless either Wm moore possibly s/o ann callister is missing from IGI or your wm is s/o Wm Moore and ann Christian (And 1835-07-19) but wm moore snr is missing from 1841c as ann is with her sister in Ballaslig thus can't chk on fa's occupn.