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: "Our thoughts and prayers are with you all. God is with you always. God Bless." The church's contact information is included on the back of the envelope.

Card made by a student from the George Washington University Hillel. The card reads: "From our community at GW, you are in our hearts. We pray for better days to come, for mitzvot (good deeds) in honor of those lost, for actions of light to crowd out darkness in Squirrel Hill and beyond."

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: "Dear Tree of Life members, I am keeping you and all of the others affected by this tragedy. My deepest sympathy, Molly [last name redacted] Holy Angels CCD."

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "Our God is stronger than hate. Our love for you in stronger than hate. We cry with you, stand with you, support you, grieve with you. Our hearts hurt but we know your strength and the strength God gives us to overcome the evil in this world. In love and solidarity, Carole."

Note from a member of The Church at Severn Run in Severn, Maryland. The front of the note reads: "Heaven is for everyone! God is Love- We love you. 'If any man says he love God, he's a liar if he loves not his brother.' 'Love they neighbor as thyself.' We are all children of the Lord. We are all the same in God's eyes. And they that be wise shall shine as the brightness of the firmament." Illustrations of a smiling heart, five-pointed star, cloud, rainbow, as well as flowers, appear below.

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 black marker. The message reads: "Love is stronger than hate." Signed with a heart.

Handmade card in colored marker on paper. The front of the card features the word: "LOVE" in bubble letters; the letter "o" has been replaced with a large Star of David. Several smaller hearts and a multi-colored asterisk appear throughout. Signed, upper left: "Rylee Love." The back is signed, twice: "Love Rylee" in orange and purple marker, respectively. The card has been laminated.

Card from a congregant at the Holy Angels Parish. The front cover contains a stock illustration of seven children holding hands around a table with a large goblet and loaf of braided bread, and seven doves. The illustration is labeled: "We are people of God's peace." The inside reads: "The Tree of Life Members, even though you are going through something tough you will get through it by praying and being with each other. Sincerely, Holy Angels CCD."

Hardwritten card in blue pen on white paper, offering condolences following the October 27 attack.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "Dear Members and Friends of the Tree of Life Synagogue, I am sorry for your loss in the recent shooting. Our prayers are with those affected by the attack and we hope that everyone injured is able to recover. Sincerely, Ben from the Point Loma Community Presbyterian Church in San Diego."

Handwritten note on the back of a piece of paper with the letterhead of KYW News Radio. The note is very difficult to read due to extensive creasing and fading caused by exposure to the elements at the Wilkins memorial.

Card with ballpoint pen illustration. One side reads "We Are With You" with zigzag decorations in corners. Reverse reads, "Don't worry. You are not by yourself. We will support you!" with illustration of hand reaching out.

Post-it note with handwritten message in green marker. The message reads: "Hate is not welcome anywhere."

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 with a peacock on the front cover. The card reads: "A Catholic who loves all Jewish people! A friend, a neighbor, she loves you."

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.

Grey and black sticker with the words: "You are beautiful" on the front. The back contains a hashtag and web link to the "You Are Beautiful" company website.

Laminated prayer card with text of the "Prayer to Our Mother of Perpetual Help" on the reverse. The front side features a reproduction of a medieval-style icon of the Virgin and child against a gold backdrop. This prayer card has the imprimatur of the former archbishop of Boston, William Cardinal O'Connell (1859-1944).