Laminated prayer card with text of the "Prayer to Our Mother of Perpetual Help" on the reverse. The front side features a reproduction of a medieval-style icon of the Virgin and child against a gold backdrop. This prayer card has the imprimatur of the former archbishop of Boston, William Cardinal O'Connell (1859-1944).

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 contains message of condolence and a wish for peace, articulated through citations to the Book of Psalms. The church's contact information is included on the back of the envelope.

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.

Light blue card with cut corners. A schematic illustration in blue pencil appears on the center-right, a scribble-scrabble line in black pencil on the center-bottom. Due to exposure to the elements at the Wilkins memorial, the message on this card is no longer visible.

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

Card addressed to David Rosenthal. Cover features a reproduction of a painting by Frank Crosby, a resident of the Emmaus Community of Pittsburgh. The inside contains messages of love and support written by other members of the Emmaus Community.

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 contains messages of support and prayer. The church's contact information is included on the back of the envelope.

Handwritten card from a student at Goddard Middle School in Littleton, Co. The cover contains a quote attributed to the ancient Chinese philosopher, Confucius: "Our greatest glory is not in never falling, but in rising every time we fall" in the upper left corner. The cover features a full-length illustration of a mountainous landscape with a deer at the center as the sun sets. The inside reads: "Dear Rabbi Jeffrey Myers, I am sorry that someone would ever do that. We're thinking about you all the way in Colorado. I'm a student in middle school. My name is Erin.

Folded card with crayon illustrations. Cover features three human figures. One is standing and smiling. Second is prone and frowning. Third is floating with face obscured. Several balloon-like shapes float toward a colored band along upper margin. Interior reads, "We are here. Right by your side. Keep fighting and good things will come." Back reads "2018" above prone human figure.

Card with colored pencil illustration. Cover features an illustration of a leafy tree with pink asterisk-shaped stars, labeled: "The place where new life can grow." Inside reads: "Baruch dayan ha'emet" in English and Hebrew, and "I am sorry for your friends and families loss. I know what it feels like. So I am sending all the way from Texas this blessing." The back is signed: "Miriam." Spelling errors have been corrected in this transcription.

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.

Folded card with marker illustration. Front and back cover features illustration of tree with heart superimposed on it. Interior features heart with X in center and words "We're all in this together. Things will get better. You're not alone."

Card from a congregant at the Holy Angels Parish. The front cover contains a stock illustration of a haloed dove flying in front of Noah's ark. The inside reads: "Dear Tree of Life, I'm sorry for your loss. Hope everything goes well. From Bella [last name redacted]."

Card addressed to Richard Gottfried, written using personal details from various public sources.

Card from a congregant at the Holy Angels Parish. The front cover contains a stock illustration of a haloed dove flying in front of Noah's ark. The inside reads: "Sorry for what happen on Saturday. I prayed for you. Love, Holy Angels CCD." Color bleeding due to water exposure at the memorial site.

Printed card in black ink on white paper. The card contains a large, empty rectangle outlined in black and reads: "I am thankful for people who help me. Nehemiah builds a wall. Nehemiah 1-6."