"Honey, my memory of the past is as dim as my chances for the future."  From Dark Shadows episode 845.

From The Ladies' Home Journal, 1945.

"Forget your troubles with 'Forgotten.'"  From The New York State Exhibitor, 1933.

"I only wish no one remembered."  From Dark Shadows episode 1194.

"Even the horses have forgotten."  From Fate Magazine, 1949.

"Are you absent-minded?  Rare gift or unfortunate lapse, it is nature's safeguard against mental worry."  From the Bombay Sunday Chronicle, 1937.

"And you must try and pretend that yesterday never happened."  From Dark Shadows episode 638.

"Cultivate your forgettory."  From Together, 1961.

"Forgetting as a fine art."  From The Improvement Era, 1970.

Here's a precursor to David Lynch's brilliant series On the Air, in which a character can't remember her mother's first name, which turns out to be Mary.  In the Duluth Herald of 1912, a man forgets his mother's first name, which turns out to be Mary.  His excuse was that he hadn't seen her in several years.

From Told By the Sandman: Stories For Bedtime by Abbie Phillips Walker, 1916.

"This is a day for remembering and forgetting."  From Dark Shadows episode 58.

"Oh, I forgot my key!"  From Awake magazine, 1958.

This makes sense for chapter one: "Short Memories," in I Forgot by Mrs. Frederick Field, 1888.

"To forget, to be free, alone."  From North Adams' 1967 yearbook.

"A gentle reminder," from a doctor's appointment card, date uncertain.

"I am trying so hard to forget you."  Date uncertain.