The ten quarterings shown on the escutcheon are as follows (with tinctures added):^[1]

• 1)Argent a cross engrailed gules between four water bougets sable (Bourchier)
• 2) Gules, a fess argent between 15 billets or 5,4,3,2,1 (Louvaine) (across the first two quarters is a label of three points for difference)
• 3)Quarterly per fess indented argent and gules (FitzWarin)
• 4)Gules, a fret or (Audley)
• 5)Argent, three aspen leaves erect gules (Cogan)
• 6)Sable, a chevron barry nebuly argent and gules (Hankford)
• 7)Argent, two bars wavy sable (Stapledon)
• 8)Argent, two bars gules each charged with three bezants (Martin)
• 9)Gules, four fusils in fess ermine (Dinham)
• 10)Gules, three pairs of arches argent (Arches). The dexter supporter of a horse or possibly heraldic antelope, stands on a pedestal showing a peacock in its pride, the crest of George Manners, 11th Baron de Ros (circa 1470–1513),^[2] whose daughter Eleanor Manners married, after 1524, as his 2nd wife, John Bourchier, 2nd Earl of Bath (1499–1560/61). The sinister supporter of a dove or falcon stands on a pedestal showing the Bourchier knot.^[3] Above the shield is the Bourchier crest: A man's head in profile proper ducally crowned or with a pointed cap gules^[4]

References

1. ↑ The same quarterings are shown on the monument of Lady Frances Bourchier (died 1612) in the Bedford Chapel, Chenies, Buckinghamshire, daughter of the 3rd Earl of Bath http://www.middlesex-heraldry.org.uk/publications/monographs/chenies/cheniesBKM-monuments.htm
2. ↑ Debrett's Peerage, 1968, p. 968
3. ↑ The Manners peacock and Bourchier knot are also shown sculpted with the arms of Bourchier impaling Manners above the south-east door to Tawstock Church
4. ↑ Visitation of Devon, 1895, p. 106