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Armorial bearings

Arms were granted and confirmed on 20 October 1797. Nelson's paternal arms (Or, a cross flory sable over all a bendlet gules) were augmented to honour his naval victories. After the Battle of Cape St Vincent (14 February 1797), Nelson was created a Knight of the Bath and was granted heraldic supporters (appropriate for peers) of a sailor and a lion.

In honour of the Battle of the Nile in 1798, the Crown granted him an augmentation of honour blazoned On a chief wavy argent a palm tree between a disabled ship and a ruinous battery all issuant from waves of the sea all proper (deemed a notorious example of debased heraldry), the Latin motto Palmam qui meruit ferat ("let him who has earned it bear the palm"), and added to his supporters a palm branch in the hand of the sailor and in the paw of the lion, and a "tri-colored flag and staff in the mouth of the latter".

After Nelson's death, his elder brother and heir William Nelson, 1st Earl Nelson, was granted a further augmentation: On a fess wavy overall azure the word TRAFALGAR or. This additional augmentation was not used by those who succeeded him in the earldom, including the present Earl Nelson.

The Garter King of Arms wrote the following explanation of the arms to Nelson's wife:

In the Chief of the Arms a Palm Tree (emblematic of Victory) between a disabled Ship and a ruinous Battery, form striking memorials of the glorious event of 1 August (1798), in the Bay of Aboukir, near the Mouth of the Nile. In the Crest, the Chelengk (a more minute description of which I had the pleasure of delivering to your Ladyship) is an indication of the distinctions rendered to his Lordship's merits by the Grand Signior; and the Naval Crown may bear a striking allusion to his Lordship's victory in those Seas, where the Corona Navalis was first conferred by the Romans on persons who had eminently distinguished themselves in Naval combats. The Palm Branch in the hand of the Sailor, and in the paw of the Lion, is a continuation of the emblem in the Chief of the Arms, as well as allusive to the Motto, "Palmam qui meruit ferat" ("let he who earns the palm bear it"). The tri-coloured Flag of the subdued Enemy was added to, and involved with, the Colours in the mouth of the Lion, which had been granted to his Lordship in commemoration of his distinguished gallantry and services, on 14 February 1797. With regard to your Ladyship's question—whether Lord Nelson is, in consequence of the Royal Warrant, precluded from the use of his Crest of the San Josef (a ship he won in battle from the Spaniards), I have no hesitation in giving my decided opinion, that he may bear it, with his new Crest, at his own pleasure.

The herald Wilfrid Scott-Giles (d. 1982) wrote a jocular verse describing the successive augmentations to the Nelson arms, ending with the line "But where, alas! is Nelson's ancient cross?"