Full sheet flyer includes image of the top half of a mans face and typed text. Text describes Lest We Forget installation.

Turquoise envelope with handwritten inscription in black ink addressed: "To the Tree of Life." Staining due to exposure to the elements at the Wilkins memorial.

Black and white reproduction of a photograph originally printed in a newspaper, showing Greek Revival synagogue. Cropped selection from larger image.

Note from a member of The Church at Severn Run in Severn, Maryland. The note is enclosed in an envelope with church letterhead, reading: "The Church at Severn Run: Love Well, Live Jesus, Believe Big!" The note inside reads: The church's contact information is included on the back of the envelope.

Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of the words: "Keep Going" surrounded by stars, arrows, and other floral motifs. The back contains a handwritten note, featuring a quote from the British historian, Richard Evans, as well as the stock signature: "From your friends at West Allegheny Middle School."

Single page program, printed front and back. Front includes decorative blue waves with image of dove and the word "peace" below. Program lists order of speakers and includes the names of the victims. Back contains the lyrics to "A Song for Healing" by Gwendolyn A. Mitchell.

Paper cut outs in the shape of a tree trunk on brown paper. The first cut out is a smaller tree trunk with branches. The second is larger and features a Star of David illustrated in white and paint and topped with a blue band of paper on the top.

Post-it note with handwritten message in green marker. The message reads: "Doubt is not the opposite of faith, fear is [underlined] let us not fear."

Folded card on red paper. Due to exposure to the elements at the Wilkins memorial, the message on this card is no longer visible.

Handmade card in watercolor and ink on paper. The front side features a hand painted illustration of a braided Challah loaf, traditionally prepared for the Jewish Shabbat. The card is signed: "Love and solidarity from Morgantown, WV." Staining due to exposure to the elements at the Wilkins memorial.

Rectangular card from a student at Fountain Valley School in Colorado Springs, Co. Front reads: "Dear members of Tree of Life, I'm from Japan and I am writing this letter because on extremely sad news about Jewish people came up yesterday. I'm feeling awfully sorry for Jewish people. I've been learning about 3 monotheistic re[li]gions from last month, so it also made me feel that I have connection with every single Jewish person.

Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of a heart with various geometric and floral motifs. The back contains a handwritten note, as well as the stock signature: "From your friends at West Allegheny Middle School."

Glass vase containing a variety of stone, colored glass, and synthetic red poppy flowers. Included in vase are tags reading, "Dept of NJ American Legion Auxiliary" and "In memoriam."

Square card with white and yellow text against blue background. Card reads, "Mitzvah4Pittsburgh. Some spread darkness. We spread light. Choose a good deed. Choose a Mitzvah. Add light to the world," followed by four options and a place for respondents to list their name and email address. Some names and email addresses have been redacted for privacy.

Note from a member of The Church at Severn Run in Severn, Maryland. The note is enclosed in an envelope with church letterhead, reading: "The Church at Severn Run: Love Well, Live Jesus, Believe Big!" The note inside reads: "In as much as He loved us, I love you." The church's contact information is included on the back of the envelope.

Handwritten card in pink and blue pencil on paper. The card reads: "I love you because you are kind." Signed with a striped heart. Spelling errors corrected for clarity. Smudging and staining due to exposure to the elements at the Wilkins memorial.