 Reichenbach’s apparent unfamiliarity at the time with the English language literature on relativity is notable and unfortunate. He cites only one essentially English language source, from The American Journal of Mathematics, and seems not to know of the work of Jeffreys or Robb. He does appear to have read Eddington’s 1921 paper on Weyl’s theory. Whatever the cause, the Axiomatization, which is one of Reichenbach’s most original technical efforts, would have been a different work, or none at all, had he taken account of those developments. 