Valentinus, fragments of letters, homilies and a psalm ("Harvest")
c. 140–160 · Greek
Groups: Valentinians
About 10 fragments are quoted by Clement of Alexandria and Hippolytus.
Where the manuscripts are now
Manuscripts of Clement's Stromata and Hippolytus' Refutation, various
e.g. Laurentianus V 3 (Stromata)
Sources
G. R. S. Mead, Fragments of a Faith Forgotten (paraphrases/translations) 1906. Public domain in the USA (published before 1930); check other jurisdictions