after the rising she assisted clarke with the irish volunteer dependants’ fund, running it when clarke had to take time off due to a miscarriage, postponing her own marriage to tom rogers to do it. she was very involved in the work and finances of the fund then she began working directly for michael collins. on his instructions she resigned from cumann na mban when a majority of its members voted to reject the treaty terms in february 1922. macmahon did not publicly support either side during the irish civil war. her public political activities had ended on 6 december 1921. however she continued to work for collins and hold papers for him until his death in 1922. collins was aware that his activities would put people working for him in danger so he was concerned. macmahon had married and moved when she did which added to her safety.