 The Axiomatization has three difficulties. It contains a mathematical error discovered by John von Neumann in the proof that two frames of reference satisfying his five light postulates and definitions could not have a world line at rest in common. Reichenbach acknowledged the error in 1925, and again in 1928, without proposing any modification to obtain uniqueness. In an unflattering review, Herman Weyl gave a second reason (Weyl, 1924; see also Rynasiewicz, 2005): the light cone structure of Minkowski space time does not suffice to specify a unique set of inertial frames unaccelerated with respect to one another, and hence neither do Reichenbach’s axioms. By introducing a singularity in the infinite past, a system of accelerated frames can be used. Weyl took this fact to defeat the very purpose of Reichenbach’s attempted reconstruction of the theories: to found them on observable relationships. But perhaps the most important problem is that much of Reichenbach’s construction, without the philosophical commentary, had been anticipated by A.A. Robb, first in 1914 (A Theory of Time and Space), and then in 1921 (The Absolute Relations of Time and Space) for both special and general relativity. Reichenbach does not mention Robb in 1924 or, to our knowledge, later, even though Robb’s 1921 book was reissued with a different title in 1936. 