In 1915, he spoke to the House of Lords about post-war reconstruction, and during the passage of the Representation of the People Act 1918 Parker (who had deputy high steward of the University of Cambridge since 1915) successfully pressed the Lords to allow women to vote in university constituencies even though they were disbarred from taking their degrees. On 19 March 1918, shortly before his death, Parker spoke on a motion by Lord Parmoor in favour of a League of Nations. Unable to read his handwriting due to failing light, Parker went to the table and read out a detailed scheme of twenty articles for the League's organisation.
In 1915, he addressed post-war reconstruction in the House of Lords. During the Representation of the People Act 1918, Parker (deputy high steward of the University of Cambridge since 1915) successfully campaigned for women to vote in university constituencies despite their disqualification from degrees. On March 19, 1918, shortly before his death, Parker spoke on a motion by Lord Parmoor supporting a League of Nations. Unable to read due to poor lighting, Parker recited a detailed twenty-article plan for the League's organization.