I see 3 diaries for sale on e-bay. I believe these diaries were written by Edith (Edythe) Evelyn Cushman, who was born 29 Sep 1893 in North Yarmouth, Maine. She was daughter of William B Cushman and Luella Eliza Young (ca 1870-3 Mar 1895). They were married 5 Nov 1892, Maine.There is record of an Edeth Cushman, living as a boarder in the 1900 census of North Yarmouth, Cumberland Co. ME in the home of Edward and Alice G Allen. This would make sense since Edith's mother had passed away in 1895 of "Phthisis, Pulmonary and Intenstinal."
I have not been able to piece all of this together but it appears that Edith may have married A Charles A Marquis. She may also have had a sister, named Peggy, born one year later, also married to a Marquis.
It would be nice if these diaries could find their way to descendants.