An autograph is a document transcribed entirely in the handwriting of its author, as opposed to a typeset document or one written by an amanuensis or a copyist; the meaning overlaps with that of the word holograph. Autograph also refers to a person's artistic signature. This term is used in particular for the practice of collecting autographs of celebrities. The hobby of collecting autographs is known as philography. An individual's writing styles change throughout the lifespan of a person; a signature of President George Washington (c. 1795) will be different from one when he was an 18-year-old land surveyor. After British Admiral Nelson lost his right arm at the Tenerife sea-battle in 1797, he switched to using his left hand. However, the degree of change may vary greatly. The signatures of Washington and Lincoln changed only slightly during their adult lives, while John F.
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