Pharos, in which he shut up the interpreters two together. In these houses, which had no windows in the wall, but only skylights, the interpreters worked from morning till evening under lock and key. In the evening they were taken over in thirty-six different boats to the palace of Ptolemy Philadelphus, to dine with him. Then they slept two together in thirty-six different bedrooms. All these precautions were taken to prevent communication between the pairs, and yet when the thirty-six copies of