in the 1920s, tried and failed to obtain a photographic copy. This forced him to use the Leningrad Codex instead for the third edition, which appeared in 1937.

The only modern scholar allowed to compare it with a standard printed Hebrew Bible and take notes on the differences was Umberto Cassuto, who examined it in 1943. This secrecy made it impossible to confirm the authenticity of the Codex, and indeed Cassuto doubted