The Knossos archive was dated by Arthur Evans to the destruction by conflagration of about 1400 BC, which would have baked and preserved the clay tablets. He dated this event to the LM II period. This view stood until Carl Blegen excavated the site of ancient Pylos in 1939 and uncovered tablets inscribed in Linear B. They were fired in the conflagration that destroyed Pylos about 1200 BC, at the end of LHIIIB. With the decipherment of Linear B by Michael Ventris in 1952, serious questions about Evans' date began to be considered. Most notably, Blegen said that the inscribed stirrup jars, which are oil flasks with stirrup-shaped handles, imported from Crete around 1200 were of the same type as those dated by Evans to the destruction of 1400. Blegen found a number of similarities between 1200 BC Pylos and 1400 BC Knossos and suggested the Knossian evidence be reexamined, as he was sure of the 1200 Pylian date.