Note thy unvalued book — MILTON’S MINOR POEMS.
Reading edition
11. thy unvalued book. In Hamlet I 3 19 unvalued persons are persons of no value, or of no rank. In Macbeth III 1 94 the valued file is the file that determines values or ranks. In Milton’s phrase the unvalued book means the book whose merit is so great as to be beyond all valuation: a new rank must be created for it.