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."

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

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.

Diamante poem by which was sent with the materials from Emergency Ministry Services, a faith-based training and disaster response NGO in San Juan Capistrano, Ca., affiliated with the Orange County Church on the Rock. A diamante poem is a seven-line unrhymed poem which is shaped like a diamond. The words of this poem washed away due to rainwater.

Envelope and card from administrators and affiliated staff at The Center for Global Understanding and Peacemaking at Elizabethtown College. Envelope is inscribed: "Tree of Life" and illustrated with a Star of David and heart. Card features an illustration of peacock feathers on the front. Card reads: "Elizabethtown College's Center for Global Understanding and Peacemaking shares our concerns and prayers for your community at this most difficult time.

Handwritten card in blue and purple marker on paper. The card features a large heart, over a Star David, with the first names of the eleven victims of the October 27 attack. The card reads: "We can't take away the pain, we can only add our love. Love, The Ettingers."

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter is dated 11/4/2018 and reads: "Dear Fellow Journeyers in Faith- May you experience others holding you in their caring arms during this time of loss and grief. Know you are not forgot. Know God can redeem this tragedy to bring about justice. -A friend in San Diego- Claudia."

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

Post-it note with handwritten message in blue marker. The message reads: "May your memory be for a blessing. Sending love and healing from Jews in Berkeley, CA." Signed with a Star of David.

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

Basket of synthetic flowers with pink bow. Basket and bow have water damage.

Folded card on green paper. A faded peace sign appears on the front cover flap. Due to exposure to the elements at the Wilkins memorial, the message on this card is no longer visible.

Handwritten note on coloring book paper. The front side features the outlines of two horses, colored in with assorted colored pencils. The note reads: "God be with you all. Love Gemma and Giovina [last name redacted]. 4 year olds." The back features the outlines of a leopard perched in a tree with a squirrel.

Natural red rose preserved in plastic box.

Floral tag from floral arrangement sent by L.F., which reads: "To my Hebrew family- I'm so sorry for your loss. There are no words. But the strength that you have shown is what we need. Stay strong. We are all here with you. L.F. [heart]." The message is written in black ink on a printed tag; a Star of David appears in the upper left corner.

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 affirms God's greatness and his love. The church's contact information is included on the back of the envelope.

Square poster that says "Love one another right NOW" with music notes and pink hearts. Poster attached to a yard stick. Blank back.

Features seven "chants," mostly taken from Hebrew scripture.

Drawing in crayon on paper featuring a multi-colored home with a floral bouquet in the center, surrounded by lollipops and a wrapped candy. Signed: "lo[ve] Anne" in the upper center.