The original of the Marriott Dodington coat of arms is at the College of Arms in London, and a painted copy may be obtained for about $1000 upon application. The sketch referenced below was made from memory after a visit.
A 1623 description of the Dodington Coat of Arms is "Quarterly 1st and 4th, Sable, 3 hunting horns Argent. 2nd and 3rd, Argent, a chevron between 3 talbots' heads erased gules". I have not seen a representation of this text: photos below are mostly Dodington quartered with Marriott, and one which has just the Dodington hunting horns. The Marriott-Dodington Coat of Arms has talbot dog on top.