man of letters(n = noun.person) - a man devoted to literary or scholarly activities;

1.  A writer, especially one who writes for a living. [PJC]

2.  A learned person; a scholar. [PJC]

N  scholar, connoisseur, savant, pundit, schoolman, professor, graduate, wrangler, academician, academist, master of arts, doctor, licentitate, gownsman, philosopher, master of math, scientist, clerk, sophist, sophister, linguist, glossolinguist, philologist, philologer, lexicographer, glossographer, grammarian, litterateur, literati, dilettanti, illuminati, cogniscenti, fellow, Hebraist, lexicologist, mullah, munshi, Sanskritish, sinologist, sinologue, Mezzofanti, admirable Crichton, Mecaenas, bookworm, helluo librorum, bibliophile, bibliomaniac, bluestocking, bas-bleu, bigwig, learned Theban, don, Artium Baccalaureus, Artium Magister, learned man, literary man, homo multarum literarum, man of learning, man of letters, man of education, man of genius, antiquarian, antiquary, archaeologist, sage, pedant, doctrinaire, pedagogue, Dr, Pangloss, pantologist, criminologist, schoolboy, learned, brought up at the feet of Gamaliel, he was a scholar and a ripe and good one, the manifold linguist.