Floral tag from floral arrangement, which reads: "We love you, pray for you and stand with you during this time. May God provide with His peace and comfort." The message is printed on a tag from a local florist.

Post-it note with handwritten message in black marker. The message reads: "I was not here, but I live nearby. Had I been home I could have grabbed my baseball bat, and gone after Bowers."

Folded card with marker illustration. Cover features illustration of tree with ladder. Interior reads, "We are with you at this sorrowful time. The Beth Chai Congregation of Greater Washington." Back cover reads "I hope you feel better. P.S. We will donate $ to you" with two five-pointed stars.

Black ribbon with gold letters stapled along its length. Message reads, "We will never forget." Ribbon is faded from sun exposure.

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 addressed to Irving Younger, written using personal details from various public sources.

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."

Card made by a student from the George Washington University Hillel. The front cover features the partial outline of a tree; most of the ink faded has faded by water damage at the memorial site. The inside, which also has partial fading due to water damage, reads: "I can't think of the words to say that could possibly make this better for all of you. Just know that we are all here for you, as a Jewish community sending love and strength your way. Though it may not seem like it now, we will all make it through this and work to make tomorrow a better day.

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.

Handwritten note from the [last name redacted] family from 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.

Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of the word: "Hope" surrounded by floral and geometric motifs. The back contains a handwritten note, as well as the stock signature: "From your friends at West Allegheny Middle School." A sticker with the words: "Stronger Together" appears in the upper center.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter is dated 11/4 and reads: "God loves you- We love you- Have strength in the LORD. Ken [last name redacted]."

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 and geometric and floral 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 bird with a leaf in its mouth and floral and geometric motifs. The back contains a handwritten note, as well as the stock signature: "From your friends at West Allegheny Middle School."

Wooden pedestal painted white with white Star of David and red heart affixed to front. Handwritten in pencil and black marker on the Star of David is the name "David Rosenthal." Collaged onto the heart are white pieces of paper and a translation of Psalm 34:18: "The Lord is close to the broken hearted and saves those who are crushed in spirit." Affixed to one side of the pedestal is a black sticker with the word "LOVE" in white letters. Accompanying image shows all 11 Stars of David in the series.

Typed floral tag from Chestnut Hills Dental stapled to floral wrapping paper. Tape across the message. Extensive tearing and 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.

Post-it note with handwritten message and illustration in blue marker. The note features an illustration of a winged angel with a sad face in the center and a sun in the upper right corner. The words: "Love > hate [encircled with a slash trough the center]" appear below.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter is dated 11/4/18 and reads: "To the families and friends of Tree of Life Synagogue: Please be comforted by the prayers for your losses- offered up by believers of many faiths. Only God can know why this tragedy occurred, but know that He will hold you in his loving arms to heal you with his abiding love and faithfulness. The prayer quilt is tired with countless prayers as well. Be comforted when you see it.

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