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   "
By our conclusion, therefore, the tunnels were dug by an ancient race which used the coal for some purpose.

   "It is no answer to say 'we can't be sure because we don't know that the Indians in this area used coal.'

   "The facts remain: here are ancient mines; they were dug by someone, if not the Indians, by someone else. Certainly by someone who preceded the white man to this area. Possibly by someone who preceded the Indians."

 

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#2 --- The following letter appeared on pages 174-175 of the October, 1947 issue of AMAZING STORIES:

   "Sirs:  Perhaps I have delayed over-long to send you my slight contribution to the master code. Why? I was still afraid there might be some slip that would put me in a bad spot. I am a druggist in this town and any trace of nut's talk would ruin my job. I have been waiting for the issue which just hit the newsstand and agree with you completely.

   "There is in this area an artifact which seems to prove all you have printed about the cavern dwellers. First I want to ask a question. How are the caverns ventilated? There is no vegetation to purify the air in the caves. Therefore there must be some connection with the surface, I know where one of the air shafts reach the surface.

   "My grandfather was raised with the Indians in this section of the country and has told me of the stories he heard when he was a child. The Indians describe the w1nd cave as it is called around here, as the home of the dev1ls who came forth in the dead of the night to steal their women and food. No Indian will venture within the area inside of five miles of the cave.

   "Perhaps a description of the inside will make my