The Helle Collection of Plath Family Photographs was assembled by June Johnson Helle with additions from her mother, Martha Plath Johnson, and her aunt, Frieda Plath Heinrichs, who were sisters of Otto Emil Plath. Some of the photographs were originally sent by Aurelia Plath to her sister-in-laws Frieda Plath Heinrichs and Martha Plath Johnson. June Johnson Helle served as executor for the personal belongings of her mother and aunt Frieda Plath Heinrichs. The photographs are annotated by Otto Plath, Aurelia Schober Plath, Sylvia Plath, and June Johnson Helle.

The collection is arranged as follows:

Series I. Photographs of Otto Plath and Siblings (1910-1930s) contains 8 items. These photographs of Otto Plath and his brother Hugo Plath and sister Frieda Plath are arranged in chronological order.

Series II. Photographs of Sylvia Plath and others (1933-1963) contains 51 items. These photographs of Sylvia Plath, Aurelia Schober Plath, Otto Plath, Warren Plath and their Schober relatives are arranged in chronological order.

Series III. Other photographs contains one postcard of Berck-Plage.

This collection is organized into three series:

• Series I. Photographs of Otto Plath and Siblings, 1910-1930s
• Series II. Photographs of Sylvia Plath and others, 1933-1963
• Series III. Other photographs, n.d.