Douglas L. Wilson will become a two-time winner of the Lincoln Prize today when his book “Lincoln’s Sword: The Presidency and the Power of Words” (Knopf) is designated the recipient of $50,000 and a bronze cast of an Augustus Saint-Gaudens portrait sculpture of Abraham Lincoln. Professor Wilson, a co-director of the Lincoln Studies Center at Knox College in Galesburg, Ill., won in 1999 for “Honor’s Voice: The Transformation of Abraham Lincoln.” “Douglas Wilson’s incisive analysis of Abraham Lincoln’s presidential writings captures a genius-craftsman at work, molding and honing phrases destined to rally his contemporaries and live in American memory,” said Richard Gilder and Lewis E. Lehrman, the businessmen and philanthropists who established the annual accolade. The prize, to be announced by its administrator, the Lincoln & Soldiers Institute at Gettysburg College, will be awarded at a dinner at the Union League Club of New York on April 2.