The annual Dudleian Lecture will be given in the Fogg Lecture Room this evening at 8 o'clock by Professor Josiah Royce. The subject, the first of the series of four prescribed in 1750 by the founder, Judge Paul Dudley, is "The proving, explaining and proper use and improvement of the principle of natural religion as it is commonly called and understood by divines and learned men." The lecture will be open to the public.