sentences:  Before attempting to build a pathway for easy removal of debris from the ruins of palaces on the Persepolis terrace, Herzfeld decided to excavate the location first to ensure that building a passage would not harm anything.He found two rooms filled up with clay tablets that were arranged in order, as in a library.The uncleaned tablets and fragments were covered up with wax and after drying, they were wrapped up in cotton and packed in 2,353 sequentially numbered boxes for shipping.