The Glaswegian suffragette, Janie Allan, apparently worked in partnership with Billinghurst during the window-smashing campaign of March 1912, with Billinghurst apparently hiding a supply of stones under the rug that covered her knees. Billinghurst's first stint in Holloway Prison was for smashing a window on Henrietta Street during this campaign, for which she was sentenced to one month's hard labour. The prison authorities were confused regarding her sentence to one month's hard labour and gave her no extra work. She was befriended by the many other prisoners, including Dr. Alice Stewart Ker, who, when Billinghurst was released, had her smuggle a letter out to Ker's daughter.