[...] This preserved work comments on Plato's "Parmenides" up to 142b. It is divided into two large parts, the first of which examines the Ideas and the second the supreme One. However, it seems that the memorandum is not preserved in its entirety as it abruptly stops. R. Klibansky, in his book Ein Proklosfund und seine Bedeutung (Heidelberg 1969), publishes excerpts from a Latin translation of Proclus' memorandum on Parmenides, which also includes the lost ending of the memorandum. [...]

(from the introduction of the book)