sentences:  Microscopic examination revealed that some of the rubrics had been deliberately erased, so the leaves could be reassembled without a tell-tale break in the text.The two volumes have been recovered; but, the 9-12 missing leaves are presumed lost.In 1970, the "Guennol Hours" (M.945) was purchased by the Pierpont Morgan Library through the Belle da Costa Greene Foundation, with additional assistance of various Library Fellows.