Fort travis mysteries  LbNA # 64178

Clues

Well I was visiting fort travis today with my family and I went in an area and if you to the big doors behind battery 236 go to the left a bit there is a place and its filled with gray sand go to the very back of that place and look up it says Percy lee and a date I haven't figured out who it was or what century it was in but still it says Percy lee and I was quite impressed seriously google it and there is no Percy lee so this is some artifact