"o.t. ""Robot Woman""; CAP from WEIRD MYSTERIES #2"
Story has been heavily reworked, panels rearranged and other artwork has been added.
Review of issue #9 by "Bobby Stewart". Could this be fanzine publisher Bhob Stewart?
Update: according to this obituary (http://file770.com/?p=16117) Stewart was from Kirbyville, Texas, so this letter was apparently written by him. He would have been 16 years old (born 1937, died 2014).