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

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.

Hand written and illustrated poem dedicated to the eleven leaves which feel from the Tree of Life, a euphemism for the eleven victims of the October 27 attack. Eleven illustrations of different kinds of leaves appear around the poem.

Post-it note with handwritten message in blue marker. The message reads: "May you all rest in eternal peace. God Bless [heart]."

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter is dated Nov. 4, 2018 and reads: "Dear Friends, I'm at a loss for words to think about the horror you've experienced and the hate that has been directed towards you. Our hearts break with you and I am so sorry this has happened to you. We are with you and are and continue to be praying for you. We are praying for comfort, protection and healing. We love you! Greg and Stephanie [last name redacted] and family."

Post-it note with handwritten message in green marker. The message reads, in Hebrew, "Shalom" (Peace). Illustrated with a green heart, flanked by stars, in the lower center.

Post-it note with handwritten message in blue marker. The message reads: "Stay strong [underlined]. If we work together hate can't win! [Heart]. [Heart] Pittsburgh [Heart]. - Stella K."

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: "We mourn for you loss and we pray the God of Abraham embraces you in fresh, new ways today and always! Shalom!" 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 a bird with a leaf in its mouth with floral and geometric motifs. The back contains a handwritten note, as well as the stock signature: "From your friends at West Allegheny Middle School."

Folded card with pencil illustration. Cover features flower on ground under words "Just remember..." Interior features illustration of heart superimposed on planet Earth with human figures dancing on it and the words, "We Are All Jews Together." Additional note reads, "Please know that Beth Chai Congregation members like us are thinking of you. Karen & Howard [last name 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 letter is dated Oct. 28, 2018 and contains words of condolence and prayer. The church's contact information is included on the back of the envelope.

Handmade card illustrated with assorted hearts of varying sizes. A large red heart appears in the middle, surrounded by smaller hearts in varying colors. Color bleeding and fading due to exposure to the elements at the Wilkins memorial.

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.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter is dated 11/4/18 and reads: "Dear All, Our hearts are crying with you. We feel you[r] pain. We pray you can worship in your house and feel safe. With Halloween just passing, I am reminded of skeletons and the fact they all look the same. We can't tell someone's faith, color, etc. We are all the same- people of God. Point Loma Community Presbyterian Church is with you, supports you, cares for you. Mary [last name redacted] Elementary School Teacher."

Preprinted card with swirling design on front. Interior includes handwritten message expressing solidarity with Tree of Life Congregation.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "Dearest Member of the Tree of Life Synagogue- We are so saddened by the tragic events of the past week. We have so many prayers and concerns for your congregation and your families. We hope that the country will feel your sorrow and hope that people all over the world will bless you. I am part of the prayer quilt ministry that provides quilts for those in need of prayer. We never know who the quilts are intended for as we sew them. But God knows.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "To my Jewish brothers and sisters: I just want you to know that my prayers and love are with you. I cannot imagine your thoughts or emotions, but I am angry and saddened. No matter what I will always be with you. Joel D. San Diego 11/2/18."

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

Card with colored pencil and marker illustration. When opened, the card shows a tree in the center with a cross on top of a yellow circle in the center left. It is inscribed with the following message: "The tree of life where more life can come to be bet[t]er" and is signed "Samuel [last name redacted]. Risd TX."