At first the new committee was named the Thomson Committee after its chairman, but this was soon exchanged for a more unassuming name, the MAUD Committee. MAUD was assumed by many to be an acronym, however it is not. The name MAUD came to be in an unusual way. On 9 April 1940, the day Germany invaded Denmark, Niels Bohr had sent a telegram to Frisch. The telegram ended with a strange line "Tell Cockcroft and Maud Ray Kent". At first it was thought to be code regarding radium or other vital atomic-weapons-related information, hidden in an anagram. One suggestion was to replace the "y" with an "i", producing 'radium taken'. When Bohr returned to England in 1943, it was discovered that the message was addressed to John Cockroft and Bohr's housekeeper Maud Ray, who was from Kent. Thus the committee was named the MAUD Committee. Although the initials stood for nothing, it was officially the MAUD Committee, not the Maud Committee.