Patricia Davies
... that Patricia Davies and Jean Argles, two sisters who signed the Official Secrets Act as World War II codebreakers, did not find out about each other's top-secret work until the 1960s?
... that <b id="mwAn4"><a class="mw-redirect" href="./Patricia_Davies_(cryptographer)" id="mwAn8" rel="mw:WikiLink" title="Patricia Davies (cryptographer)">Patricia Davies</a></b> and <a href="./Jean_Argles" id="mwAoA" rel="mw:WikiLink" title="Jean Argles">Jean Argles</a>, two sisters who signed the <a href="./Official_Secrets_Act_1939" id="mwAoE" rel="mw:WikiLink" title="Official Secrets Act 1939">Official Secrets Act</a> as World War<span id="mwAoI" typeof="mw:Entity"> </span>II codebreakers, did not find out about each other's top-secret work until the 1960s?