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 members, I am keeping you and all of the others affected by this tragedy. My deepest sympathy, Molly [last name redacted] Holy Angels CCD."

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.

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, "Stronger Together" sticker, as well as the stock signature: "From your friends at West Allegheny Middle School."

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 solidarity and a prayer for love. The church's contact information is included on the back of the envelope.

Folded card with marker illustration. Cover shows two balloons, a heart, and smiley face. Inside reads: "I hope everything gets better. I hope this never happens again. We are here for you." Signed with a heart.

Note from a member of The Church at Severn Run in Severn, Maryland. The front of the note reads: "Heaven is for everyone! God is Love- We love you. 'If any man says he love God, he's a liar if he loves not his brother.' 'Love they neighbor as thyself.' We are all children of the Lord. We are all the same in God's eyes. And they that be wise shall shine as the brightness of the firmament." Illustrations of a smiling heart, five-pointed star, cloud, rainbow, as well as flowers, appear below.

Folded card on orange paper. The front cover feature a large Star of David outlined in black marker. The inside features a cartoon of a young girl wearing a Star of David t-shirt. Creasing due to exposure to the elements at the Wilkins memorial.

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: "We are praying for you. May God guide you through. Love, you[r] friend at Holy Angels." Spelling errors corrected for clarity.

Card from the Friendship Circle of Illinois. The front cover shows an upper and lower case "H." The inside features an illustration of two stick figures.

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 messages of condolence and prayer. 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 flower with petals, leaves, and geometric patterns. 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."

Folded card on white paper. Extensive pink staining in the center. Traces of yellow and pink writing and hand drawn illustrations visible in the upper center and lower left. Dirt stains throughout. Due to exposure to the elements at the Wilkins memorial, the message on this card is no longer visible.

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."

Print out with the names of the eleven victims of the October 27 attack. Photographs have been included for Joyce Fienberg, Richard Gottfried, Rose Mallinger, Jerry Rabinowitz, David and Cecil Rosenthal, Daniel Stein, and Melvin Wax. The names and photographs are accompanied by the following message: "In Loving Memory, Gone But never forgotten." Tears and creasing due to exposure to the elements at the Wilkins memorial.

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: "I'm praying for everyone that lost a love one. I will pray for everyone that died. Sincerely, Hannah [last name redacted]." Spelling errors corrected for clarity. Color bleeding due to water exposure at the memorial site.

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

Handwritten note signed by Ben and Beth of Toronto. Written in black ink on the back of stationary with the logo of Marriott Hotels. Staining due to exposure to the elements at the Wilkins memorial.