Kashf‐i ḥaqā'iq‐i Zīj‐i Īlkhānī (Uncovering of the truths of the Īlkhānid astronomical handbookis a commentary on Ṭūsī's astronomical handbook entitled Zīj‐i Īlkhānī. Nīsābūrī wrote the Kashf right after the Sharḥ and focused on topics closely connected to the Sharḥ, e.g., observation and prediction of planetary positions. [see R.G. Morrison]