 A number of other important texts dealing with philosophically important topics were written or compiled in the Han as well. The etymological dictionary Shuowen Jiezi of Xu Shen (58–147 CE) had a major influence on later understandings of important philosophical terms, despite its sometimes fanciful and questionable etymologies, and is still consulted today. The Baihutong Delun, an account of an important council held in 58 CE, was compiled by Ban Gu, brother of Ban Zhao and the primary author of the Han Shu (Book of the Han). In addition, it is in the Eastern Han that we see the first references to Buddhism, a religious and philosophical tradition that would come to play an enormous role throughout the rest of Chinese history. Though knowledge of Buddhist teachings seems to have been relatively limited at the time, we find references to the Buddha as a seemingly Daoist-like figure. In the minister Xiang Kai’s (d. 184 CE) memorial to Emperor Huan in 166 CE, recorded in the Hou Han Shu, we find one of the earliest references to Buddhism. Discussing an image of the Buddha found in the palace, Xiang gives a brief account of Buddhist views and links them with the Huang-Lao teachings, focusing on emptiness, eliminating desires, and “non-forced action” (wu wei 無為).