Both Cambridge and Harvard Yard police maintained a close guard over the home of President Lowell throughout last night. The President was one of three men prominent in the Sacco-Vanzetti case whose homes were thrown under police protection following news of the bombing of the residence of Judge Webater Thayer in Worcester yesterday morning.

Plain Clothes Men Sent

Early in the day two plain-clothes men were detailed from the Brattle Square station to watch the President's house and observe all persons entering the Yard. As soon as he learned of the bombing, C. R. Apted '06, superintendent of caretakers, also sent a guard of special detectives to guard the side of the President's house fronting upon the Yard.

Up to a late hour last night no untoward happenings had been reported, although the officers were prepared to continue their vigil throughout the night. Orders issued from police headquarters instructed the men on guard to make themselves as inconspicuous as possible, and ordered divisional squad cars to pass the places under guard at short intervals.

Member of Governor's Commission

President Lowell was a member of the so-called Lowell Commission appointed by former governor Alvan T. Fuller of Massachusetts to examine the evidence submitted to Judge Webster Thayer in the famed Sacco-Vanzetti case. Acting in accordance with the commission's findings, Governor Fuller refused to take any executive action in the line of pardoning the convicted men or commuting their death sentences. Fuller and Judge Robert Grant of Boston, also a member of the investigating commission, were guarded along with President Lowell. The third member, President Stratton of M.I.T., has since died.

Information from Worcester late last night revealed that no arrests had been made in connection with the bombing.