Thoth was dead.

"My days after that were spent in study. I must find this subtle poison
which was strong enough to undo the elixir. From early dawn to midnight
I bent over the test-tube and the furnace. Above all, I collected the
papyri and the chemical flasks of the Priest of Thoth. Alas! they taught
me little. Here and there some hint or stray expression would raise hope
in my bosom, but no good ever came of it. Still, month after month, I
struggled on. When my heart grew faint I would make my way to the tomb
by the palm-trees. There, standing by the dead casket from which the
jewel had been rifled, I would feel her sweet presence, and would
whisper to her that I would rejoin her if mortal wit could solve the
riddle.

"Parmes had said that his discovery was connected with the ring of
Thoth. I had some remembrance of the trinket. It was a large and
weighty circlet, made, not of gold, but of a rarer and heavier metal
brought from the mines of Mount Harbal. Platinum, you call it. The ring
had, I remembered, a hollow crystal set in it, in which some few drops
of liquid might be stored. Now, the secret of Parmes could not have to
do with the metal alone, for there were many rings of that metal in the
Temple. Was it not more likely that he had stored his precious poison
within the cavity of the crystal? I had scarce come to this conclusion
before, in hunting through his papers, I came upon one which told me
that it was indeed so, and that there was still some of the liquid
unused.

"But how to find the ring? It was not upon him when he was stripped for
the embalmer. Of that I made sure. Neither was it among his private
effects. In vain I searched every room that he had entered, every box
and vase and chattel that he had owned. I sifted the very sand of the
desert in the place where he had been wont to walk; but, do what I
would, I could come upon no traces of the ring of Thoth. Yet it may be
that my labours would have overcome all obstacles had it not been for a
new and unlooked-for misfortune.

"A great war had been waged against the Hyksos, and the Captains of the
Great King had been cut off in the desert, with all their bowmen and
horsemen. The shepherd tribes were upon us like the locusts in a dry
year. From the wilderness of Shur to the great bitter lake there was
blood by day and fire by night. Abaris was the bulwark of Egypt, but we
could not keep the savages back. The city fell. The Governor and the
soldiers