H.E.M. Newman, in his "Resume of the Newman Background and of its Connections with Somerset" records that "Charles II after his restoration, rewarded Richard for his loyalty and for financial help during his exile with a royal augmentation, namely 'gules a portcullis royally crowned' to his coat of arms, viz: quarterly sable and argent: in the first and fourth quarters three mullets argent.

Based on his advice, I drew (a long time ago and not very well) the Coat of Arms illustrated below.