Handwritten card from a student at Goddard Middle School in Littleton, Co. The front cover contains the following quote attributed to the movie star, James Dean: "Dream as you'll live forever, live as you'll die today." A Star of David appears below. Another quote, attributed to the author, August [middle initial and last name redacted] appears on the bottom right: "An empty box in an empty room is hard to fill, but over time it fills slowly..." An open, empty box appears above.

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."

Unsigned card with handwritten note reading, "So sorry for your loss. Please know that ALL of Pittsburgh is UNITED with you! Much love [two heart symbols]."

Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of the words: "Keep going" and a pattern with flowers, leaves, arrows, and shooting stars. The back contains a handwritten note, as well as the stock signature: "From your friends at West Allegheny Middle School."

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "My prayer- my prayer is for all the people affected to be at peace. Please Lord look after their friends and family, loved ones in this time of need. In God's name I pray. Amen."

Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of a heart with floral and geometric motifs. A handwritten note and signature appear in the upper and lower right corners respectively. The back features the stock signature: "From your friends at West Allegheny Middle School."

Post-it note with handwritten message in black ink. The message reads: "Sending love, support, and solidarity." Color bleeding due to exposure to the elements at the Wilkins memorial.

Pamphlet from the Christian organization "Bridge to Salvation."

Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of a heart 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."

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: "Just to let you know that you are truly in our thoughts and prayers. You are God's chosen people. He is always with you, and will never leave you. God Bless, Marce." The church's contact information is included on the back of the envelope.

Floral tag from floral arrangement sent by a group of six families. The tag commemorates the ten trees that were planted by the National Forest Foundation in memory of the October 27 attack victims. The note is printed on a tag with a beige background from a local florist.

Post-it note with abstract illustration in blue and green marker.

Post-it note with handwritten message in black marker. The message reads: "We will be better." Minor staining 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 reads: "G-d be with you. Know that the great-grandson of Or' [?]- gollath will always fail through those who the follow one true G-d." David.

Card from three students [last names redacted] at Magen David Yeshivah High School in Brooklyn, Ny. Front cover features a red heart in the center with lines connecting to Stars of David on either side. The inside message has faded away due to water exposure at the Wilkins memorial. The back flap contains a message of sympathy and condolence. The card ends: "GET WELL SOON! [heart]."

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "Dear Friends at Tree of Life Synagogue, My heart hurts and aches for the tragedy and violence you have seen. I have thought about it many times as I sit in my own church with family and friends. May God wake with you always, ALL ways, may His breath be in yours, may you heal and grow together from this horrible loss. With much love, Katie [last name redacted] from PLCPC.

Post-it note with handwritten message in green marker. The message reads: "Pittsburgh, I will always love you. My heart goes out to you and is here too. Pittsburgh Strong."

Handwritten card from a student at Goddard Middle School in Littleton, Co. The front cover features a large Star of David and contains the following quote attributed to Albert Einstein: "Life is like riding a bicycle. To keep your balance, you must keep moving." The inside reads: "Dear Rabbi Jeffrey Myers, I am sorry for your loss, and violence. I am a student from all the way from Denver, Colorado. So from all of us from Colorado we give you good wishes. Sincerely, Will [last name redacted]."