Rev. Endicott Peabody, LL.M., D.D. '04, headmaster of Groton School, will speak on "The Ministry and Choice of a Career" in the Assembly Room of the Union tomorrow evening at 8 o'clock. This lecture, which will be the fifth in the series of six Union lectures on professions, will be open to all members of the University. The final lecture in the series will be given by Mr. W. B. Parsons, of the Isthmian Canal Commission, on "Civil Engineering as a Career" on Thursday, March 17.