somewhat non-plussed

"A tremendous revival of bicycle riding by men and women of all ages has San Francisco traffic police somewhat non-plussed. Much of the riding is in picturesque Golden Gate Park, and the job of keeping cyclists off equestrian paths, out of the way of automobiles and on the right side of the bicycle path, is more trouble than restoring 10 kids, lost at the playgrounds to their parents. Miss Sally Emerson and Miss Jean Williams insist upon knowing why Park Policeman Arthur Dolan arrested them--and he is hard put to explain the wording of the ancient ordinance.".

March 1, 1933