Liu An
The attribution of the "Liexian zhuan" to Liu Xiang occurred relatively early, and it was accepted by the Eastern Jin Daoist scholar Ge Hong. Ge's c. 330 "Baopuzi" describes how Liu redacted his "Liexian Zhuan" in a context explaining the reason Liu failed to produce an alchemical gold elixir using the private method of Liu An was because no teacher had transmitted the necessary oral explanations to him.