However, two lead coffins clearly labelled as George Plantagenet and Mary Plantagenet were subsequently discovered elsewhere in the Chapel (during the excavation for the royal tomb house for King George III under the Wolsey tomb-house in 1810–13), and were moved into the adjoining vault of Edward IV's, but at the time no effort was made to identify the two lead coffins already in Edward IV's vault.
To blykister tydeligt forsynet med navnene George Plantagenet og Mary Plantagenet er imidlertid senere blevet fundet et andet sted i kappelet (under udgravningen for det kongelige gravhus for kong Georg 3. af Storbritannien under Wolsey gravhuset i 1810-13) og flyttet til Edvard 4.'s tilstødende gravhvælving, men på dette tidspunkt blev der ikke gjort nogle anstrengelser på at identificere de to blykister, der allerede befandt sig i Edvard 4.'s gravhvælving.