Post-it note with handwritten message in pink marker. The message reads: "Our hearts cry with yours for shalom." Signed with a heart, cross, and Star of David.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "To the Tree of Life Community, We are praying for you in San Diego and sending you blessings through this difficult time. God is with you and holding your members who passed in His loving hand. May His light fill your hearts during these dark times and remind you of His love even through the things we cannot explain. Bless you, Gresham." An illustration of a tree filled with hearts appears below.

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: "To my Brothers and Sisters, In spite of the fear, ignorance and hate, may your resolve grow stronger and your love grow bolder. Bless God and God Bless, Brenda." The church's contact information is included on the back of the envelope.

Post-it note with handwritten message in black marker. The message reads: "Jersey strong supports #pittsburghstrong. God bless you all!"

Post-it note with handwritten message in black and red marker. The message reads: "If you mess with us. You mess with the entire world." Signed with a heart, colored in red and outlined in black.

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 prayers for peace and unity. The church's contact information is included on the back of the envelope.

Post-it note with handwritten message in green marker. The message reads: "To never be silent at the arms of our oppressors."

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: The church's contact information is included on the back of the envelope.

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.

Brown envelope with handwritten note in black ink on a rectangular emblem, reading: "In Memory." Staining and creasing due to exposure to the elements at the Wilkins memorial.

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.

Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of a leaf with geometric motifs and the signature, "Ty" [last name redacted]. The back contains a handwritten note, a "Stronger Together" sticker, and the stock signature: "From your friends at West Allegheny Middle School."

Post-it note with handwritten message in green marker. The message reads: "Love is all you need!" The "o" is written as a heart.

Silver box with metallic polka dot lining used to hold the cards sent by students at West Allegheny Middle School in Imperial, Pa. A handmade card with a tree at the center glued to a green ribbon is tied with a bow in the center. The tree trunk is adorned with a banner, reading: "Please take what you need" and is signed: "West Allegheny Middle School" with a heart.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "Prejudice is the child of ignorance- Sister Corita Kent. We who are enlightened through Christ Jesus stand with you. -Dean [last name redacted]."

Post-it note with handwritten message in green marker. The message reads: "Never again." The signature is illegible.

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, I'm sorry for your loss. Hope everything goes well. From Bella [last name redacted]."

Photograph showing 11 adults and children standing and sitting on a sidewalk before a house. One person holds a sign reading, "Congregation Dor Hadash Salutes Israel on 25th Anniversary." Other hold Star of David flags.

Handwritten note written on lined notebook paper reading: "Filled with grief- Prayers for peace and justice."