[T]o the Earl was allowed the Crown Naval, but to the Marquis was anciently given a Crown Mural: and now, being altered with other fashions forsooth, it must rather be
a garland of flowers, that is to say, a Crown fleury, of quatrefoils.

– From The Blazon of Gentrie by Sir John Ferne (1586), p137

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Arms of Corby Borough Council, England

Corby Borough Council

Granted 1958

Blazon: Gules a cross patonce between four oak leaves each enfiled by a ducal coronet or

Crest: On a wreath of the colors a raven wings addorsed and displayed sable, beaked, membered, gorged with a ducal coronet, and chained or, the dexter claw resting on a gad of steel proper

Mantling: Gules lined or

Motto: Deeds not words