From our files two hundred years ago: the arms of Francis John Ringler Thomson, February 1825, PRAABS volume 3 folio 7 and his brother, John Ringler Thomson. PRAABS volume 3 folio 31, June 1825.
The blazons both read "Quarterly first and fourth Argent a stag's head cabossed Gules attired with five tines on each horn Or, and on a chief Azure a cross crosslet of the Third between two mullets pierced of the First; second and third Azure three rings two and one Or" (in John's case adding "all within a bordure Gules for his congruent difference".) Balfour Paul in his Ordinary removes the "five tines", substitutes "spur-revels" for the mullets and "annulets" for the rings.