[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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Stanley Baldwin

Arms of Stanley Baldwin, 1st earl Baldwin of Bewdly, Prime Minister 1923-1924, 1924-1929, and 1935-1937 (1867-1947) 

Blazon: Argent on a saltire sable a quatrefoil or

[In addition to the label for the eldest son,] the other marks of difference are: For the second son a crescent; for the third son a mullet; for the fourth son a martlet; for the fifth son an annulet; for the sixth son a fleur-de-lis; for the seventh son a rose; for the eighth son a cross moline; for the ninth son a double quatrefoil.

A Complete Guide to Heraldry by A. C. Fox-Davies, p. 488