Every time that he passed the law-school, which rarely happened, he buttoned up his frock-coat,--the paletot had not yet been invented,--and took hygienic precautions.

他每次打法学院门前走过时（这对他来说是不常有的事），他便扣好他的骑马服（当时短上衣还没有被发明），并采取卫生措施。