Miniature New York State flag. Wrapped around stem of flag is a slip of laminated yellow paper reading, "In Memory of our Brother In Memory of our Brother SYLVAN SIMON z''l -- To his family and community we pray Tanuchamo min hashamayim. May God in Heaven comfort you. The Principals, Teachers, Parents, Alumni, and Students of Magen David Yeshivah. Brooklyn, NY." Part of a series of 11 flags, each dedicated to one of the victims. Additional photograph shows the entire set of 11.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter is dated 11/4/18 and reads: "Tree of Life Community- All of your brothers and sisters at Point Loma Community Presbyterian Church mourn with you. We are absolutely devastated at the events of last week's service, and there are no words one can say to make sense of it. The God of Abraham, Isaac, David, and Jacob is with you, and we pray for comfort, community, city, our country and our world.

Post-it note with handwritten message in green marker. The message reads: "Love."

Hallmark card from a member of St. Peter's Episcopal Church in Londonderry, New Hampshire. The inside reads: "Please know that you are in our thoughts and prayers. St. Peter's Episcopal Church Londonderry, NH."

Post-it note with handwritten message in black marker. The message reads: "Sending love from Detroit, MI." Tape on the upper edge.

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."

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 Daniel Stein. Cover features a reproduction of a painting by Frank Crosby, a resident of the Emmaus Community of Pittsburgh. The inside contains messages of love and support written by other members of the Emmaus Community.

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."

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.

Handwritten card from a student at Goddard Middle School in Littleton, Co. The front cover contains the following quote: "All stars are in the dark and darkness dies in the light." The quote is accompanied by two illustrated five-pointed stars. Inside reads: "Dear Rabbi Jeffrey Myers, I am so sorry for your loss. Just know that people all the way from Colorado support you and are helping you through this. With love -Josh [last name redacted], Littleton, Colorado."

Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of a leaf with geometric and faunal 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 red marker. The note, which is encased in a large heart, reads: "Remember Always [Star of David]."

Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of the words: "Don't Stop Believing." The back contains a handwritten note, as well as the stock signature: "From your friends at West Allegheny Middle School."

Typed floral tag from Chestnut Hills Dental. Tape placed over printed message; staple on the right. Creasing due to exposure to the elements at the Wilkins memorial.

Folded card on light blue paper. The inside features an illustration of a young girl wearing a Star of David t-shirt. The girl is outlined with various scribble scrabble lines in black pen. Smudges of a rainbow appear on upper left side. The front cover features a Star of David outlined in black marker and shaded in purple. Smudging, color bleeding, and 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 a turtle with floral and geometric motifs on its shell, legs, and neck. The back contains a handwritten note and a sticker with blue text reading: "Stronger Together." The stock signature: "From your friends at West Allegheny Middle School" appears in the lower center.

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."