I searched up your message re ketteringham but am not sure where the thread started!
I have a Mary Ann Ketteringham from Marham Norfolk probably born before 1850 who married an Isaac Howe (b1849)
A family book shows a John Angel Ketteringham (1859-1917)
a Frederick Ketteringham (1853-1925) a William Ketteringham (1845-??) and a Martha Ketteringham (no dates). Any link with whatever it was you were corresponding on?!