A fanzine edited by Roger Conway for the Futurians. This is not the X Document, X from 1945.

Issue Date Pages Notes
1 1941 12
2 June 1941 14
3 December 1942 4 Final issue

http://www.fanac.org/fanzines/X/ (IA) Copies at Fanac

from Fancyclopedia 2 ca. 1959
The most important of these unknowns in stf is the mysterious platinum-group metal which, in the Skylark Series, acted as a catalyst in atomic disintegration.
from Fancyclopedia 1 ca. 1944
The name of several publications and anonymous writers.