Tolkien and the Newman Association

A while ago I stumbled on a reference to a letter, co-signed by Tolkien, published in The Times for Friday, 28 January 1949 (page 5).  This letter isn't referenced in any of the usual sources, so it makes for a minor discovery.  The letter is signed by Tolkien and nine others, comprising the Honorary President of the Newman Association and nine Honorary Vice Presidents, the latter including