Cambridge police were contemplating a door-to-door checkup of the Houses last night, but not in quest of a violator of parietal or municipal rules. The boys in blue have merely turned salesmen for the week, to plug the first benefit ball conducted by the geudarmerie since 1942.

The night of December 3 and the Hotel Commander will be the time and scene of the crime, and one dollar gets a ticket small enough to be folded inside a driver's license. Officer Leo Gutash of the traffic division, conducting the Dunster House cauvass, called upon resident undergraduates to support the preservation of the preservers of law and order, as they have done in the past.

Commuters, he said, who were unlucky in the recent draw for Yard lodging, should not seek to evade parental supervision for truancy with hotel space in the Cambridge clink. They should, however, purchase a ticket from the friendly cop on the corner.