 Manuscript evidence shows that Newton's earliest known piece writing, a Latin phrasebook, as well as the first letter in his hand which has yet been found, addressed to a ‘Loving friend’, were copied from an unpublished version of a work on Latin pedagogy by William Walker, a schoolmaster and rector whose acquaintance with Newton is documented from 1665.This suggests an early influence of the schoolmaster on the natural philosopher when he was still a schoolboy.In June 1661, he was admitted to Trinity College, Cambridge as a sizar—a sort of work-study role.