Una McCrudden was a member of the Belfast branch of Cumann na mBan, which was an auxiliary of the Irish Volunteers.
On 23 December 1910, MacDiarmada writes of "a few Dublin people who insist on running Sinn Féin as a little semi-respectable semi-political and three quarter Dublin Corporation Debating Society, and ignoring the Country and the broad national question which it is supposed to be fighting..."