15th century stained glass in Church of St John the Baptist, Higher Ashton, Devon, showing Chudleigh ("Chuddlegh") impaling Copleston quarterly of fourArms of Copleston of Copleston, Devon: Argent, a chevron engrailed gules between three leopard's faces azure, quartering: Argent, a chevron between three talbot's heads erased sable as seen in 15th century stained glass in Church of St John the Baptist, Higher Ashton, Devon.
15th century stained glass in Church of  St John the Baptist, Higher Ashton, Devon. Arms of Chudleigh impaling quarterly of 4:

1&amp;4: Copleston of Copleston, Devon. See  Report and Transactions of the Devonshire Association, Vol.31, 1st Series (Vol 1, 2nd Series), Plymouth, 1899, Maxwell Adams, A Brief Account of Ashton Church and of Some of the Chudleighs of Ashton, p.187[1])
2&amp;3: Argent, a chevron between three talbot's heads erased sableThis is a statement of a now unknown marriage of a Chudleigh to a wife from the Copleston family of Copleston in the parish of Colebrooke in Devon. For the avoidance of any doubt the family names are stated in Gothic lettering underneath the shield as "Chuddlegh - Copleston". However, no marriage is listed in the pedigrees of either family in the Heraldic Visitations of Devon during the 15th century (Vivian, Lt.Col. J.L., (Ed.) The Visitations of the County of Devon: Comprising the  Heralds' Visitations of 1531, 1564 &amp; 1620, Exeter, 1895, pp.189, 224). Nor is the quartering of Argent, a chevron between three talbot's heads erased sable, of unknown family, explained in the Copleston pedigree in that source. This was at a time when the Copleston family was at the height of its power and wealth, as Philip Copleston of Copleston, Sheriff of Devon in 1472, had married the great heiress Anne Bonvile, daughter of John Bonvile of Shute, whose inheritance included the manors of Tamerton Foliot (within which was the later Copleston seat Warleigh) and Chagford. Pole wrote: "By this match of Bonvile's daughter the estate of Copleston was greatly augmented" (Pole, Sir William (d.1635), Collections Towards a Description of the County of Devon, Sir John-William de la Pole (ed.), London, 1791, p.335). The eldest son of this marriage to Anne Bonvile was Raphe Copleston (d.1491) "The Great Copleston", named on account of his great revenue. The arms Argent, a chevron between three talbot's heads erased sable quartered here by Copleston are not the arms of Bonvile, nor of Hawley of Dartmouth, representing Elizabeth Hawley the heiress mother of Philip Copleston of Copleston, Sheriff of Devon in 1472, daughter and heiress of John Hawley of Dartmouth, 12 times a Member of Parliament for Dartmouth. Nor are they the arms of Philip Copleston's maternal grandmother, another heraldic heiress, namely Catherine Graas, wife of John Copleston (d.1433) of Copleston. Various families bearing the arms Argent, a chevron between three talbot's heads erased sable or similar are listed in 

Papworth, John Woody, Alphabetical Dictionary of Coats of Arms Belonging to Families in Great Britain and Ireland, Vol.I, London, 1874, pp.436-7, none of which feature in the Copleston pedigree in the Heraldic Visitations. (Duncombe, Hall, Hull of Devon, Tuck, etc). Pole (p.489) gives the arms of "Hull of Larkbere" in the parish of St Leonard's (now a suburb of Exeter) as: Gules, a chevron between three talbot's heads erased sable. The pedigree of "Hull of Larkbeare" in the Heraldic Visitations (Vivian, p.492) does not list any marriage to a Copleston. Vivian however gives the arms of "Hull of Larkbeare" differently as Sable, a chevron between three hound's heads erased argent, thus with tinctures reversed. Furthermore, the first listed member of the family of "Hull of Larkbeare", namely Henry Hull of Larkbeare, married Margery Talbot, daughter and heiress of "John Talbott of Exeter". These are likely the canting arms of Talbott, adopted by the Hull family following this marriage. Pole (p.504) gives the arms of Talbot ("of Sowreton, of Ham, of Exeter") as Argent, a chevron between three talbots (passant) sable (sic), the bracketed addition "(passant)" added by a later editor. Maxwell Adams gives the arms in Ashton Church as "Talbot" (Maxwell Adams, A Brief Account of Ashton Church and of Some of the Chudleighs of Ashton, p.187 (footnote 6), quoting Lysons, p.167 (Daniel Lysons and Samuel Lysons, 'General history: Families removed or extinct by 1620', in Magna Britannia: Volume 6, Devonshire (London, 1822), pp. clxi-clxxii [2]). No marriage to a Talbot is recorded in the Copleston pedigree.