Kao Yu of the Eastern Han, was the author of commentaries on the Huai-nan tzu, the Lü-shih ch'un-ch'iu and the Chan-kuo ts'e. As he tended to couch simi1ar comments as well as glosses in similar wording, we can collate them to arrive at more reliable readings.Extant editions of the Lü-shih ch'un-ch'iu, including those published in the Yüan. or the Ming, are not free from corruption. Kao Yu's commentary is no exception. This article attempts to compare Kao Yu's commentaries where there are duplications in the other two works. It is hoped that this will be helpful to students of Han commentaries to early works.