From Catalogue of sels in the department of mnuscripts in the British Museum", vol. 1, p. 214. 
<p>Seal #1493. William de Longchamps. A. D. 1189-1197. Lord High Chancellor.
Pointed oval : the Bishop, full-length, on a corbel or cushion, lifting up the right hand in benediction, in th left hand a pastoral staff.
</p><p>WILIELMUS DEI GRACIA ELIENSIS .....
</p><p>R. A smaller pointed oval counterseal. A crescent enclosing an estoile of eight points wavy. There are some small and uncertain letters in the field near the crescent. 
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DOMINI REGIS ANGLIE CANCELL'
Walter de Gray Birch
2020-04-13
"Catalogue of seals in the department of manuscripts in the British museum", Vol. 1 by Walter de Gray Birch, 1887, p. 214.