Post-it note with handwritten message in green marker. The message reads: "You are not alone. [Heart]."

Floral tag from floral arrangement sent in honor of the congregation at Tree of Life Synagogue. The note is printed on a tag with a beige background from a local florist, Oliver Flower Shop.

Card addressed to Joyce Fienberg, written using personal details from various public sources.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "Dear Tree of Life members, You have all been in my heart and prayers this past week. It is impossible to imagine what you all must have experienced, but I would hope that your faith and strong community would be very healing at this time. I am so impressed with the response of your congregation- to just keep going, as the Jewish people have done for thousands of years throughout history.

Envelope containing letters written by members of the Point Loma Community Presbyterian Church in San Diego, California. The envelope is labeled with a piece of paper reading: "Letters for Tree of Life Synagogue."

Handwritten card in pencil on paper. The front cover features a Star of David in the center and reads in Hebrew: "L'chaim" (to life). The inside reads: "I'm so sorry for your loss. Sending you love, Mimi [last name redacted]." A Menorah appears in the center.

Post-it note with handwritten message in green and red marker. The message reads: "Love is stronger than hate. Rest in peace. Jaime." The "o" in love and the dot in the "i" in Jaime are written with hearts.

Post-it note with handwritten message in blue marker. The message reads, in English and Hebrew: "Be strong, be strong and may we all be strengthened."

Post-it note with handwritten message with red marker. The message reads: "Oh, Jerry we miss you so much. [Heart] R.S."

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "To our Brothers and Sisters at Tree of Life Synagogue, First off, my heart is saddened by the unspeakable tragedy that visited your community last week. My (one) heart breaks with you and we mourn beside you. Second, I feel anger that this could happen. Anger that anyone who have so much fear and brokenness in them that they could commit this kind of act. Finally, and most profoundly, I feel a sense of hope!

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "Dear friends, My heart and prayers are with all of you as you process your loss and the events in these past few days. May God's presence and comfort be showered on every one of you. I cannot even begin to imagine... I pray for God's grace and blessings. With love, Cheryl [last name redacted]."

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 in blue marker. The message reads: "Rest In Peace. In your Happy Place Now."

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter is dated November 4, 2018 and reads: "Dear Friends, May I never understand the anger and the hatred that has been loosed on you in Pittsburgh. May the awful misunderstanding that leads to these feelings in too many others be washed from the face of the Earth. I am ashamed for so many on our planet, whether they murder Jews, Coptics, journalists, or perceived blasphemers. And I am angered by the fomenting of such terror by our leaders and by the silence of our politicians.

Card with abstract images painted and drawn by a young child. The words: "Love on you" appear in large letters inside on the lower left.

Post-it note with handwritten message in blue marker. The message reads: "No hate" [heart, broken heart]. Just [heart]."

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: "Even in dark times there's still hope! I'm praying for you ALL! From Holy Angels CCD." Spelling errors corrected for clarity.

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: "In as much as He loved us, I love you." The church's contact information is included on the back of the envelope.

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 has faded due to water damage; the remaining text reads: "Hello we would like to send some thoughts, love, and positivity during this time because you matter." The church's contact information is included on the back of the envelope.

Floral tag from floral arrangement sent by the Lambe, Platt, and Sprague families. Message is handwritten in blue ink on a printed tag with a white rose on the left edge.