Note addressed to Jerry Rabinowitz written on the back of a business card from Doug [last name redacted], a certified Pilates instructor in the Pittsburgh area.

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 words of prayer and encouragement. The church's contact information is included on the back of the envelope.

Letter from administrators and affiliated staff at The Center for Global Understanding and Peacemaking at Elizabethtown College. The front of the letter is inscribed with letterhead from the The Center for Global Understanding and Peacemaking at Elizabethtown College. Message reads: "Elizabethtown College's Center for Global Understanding and Peacemaking shares our concerns and prayers for your community at this sad and difficult time.

Post-it note with handwritten message in black ink. The message reads: "We are all brothers and sisters. Your struggle is our struggle. - A Muslim." Color bleeding 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.

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 messages of love and prayer. 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 the words: "Be Strong" and other floral and geometric 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 turtle with floral and geometric motifs on its shell, legs, and neck. The back contains a handwritten note, as well as the stock signature: "From your friends at West Allegheny Middle School."

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 sender added four colored rectangles inscribed with the following messages: "Mandy [last name redacted] LOVE everyone" and "Shine Bright with Love." The inside reads: "Wishing you a very peaceful life with people who love and care about your loss. Have a happy holiday(s)! From: Mandy [last name redacted]. To: You."

Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of a bird's feather 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."

Handwritten note written in brown marker on green coloring paper reading: "Let there be love and light in this world. Our thoughts are with this community. We send our love, light and peace. C. [last name redacted]."

Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of the words: "I am here in this moment" as well as arrows and other geometric motifs; a handwritten inscription appears above. The back contains a handwritten note, as well as the stock signature: "From your friends at West Allegheny Middle School."

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "Dear People of God, There are no words sufficient... Know that I and this people of our congregation stand with you- we are with you. With the love of the true and living God, Patrick [last name redacted] San Diego, CA."

Envelope and floral tag addressed to Jerry Rabinowitz. The envelope is addressed "Jerry" and features an illustration of a bow and heart. The floral tag contains an illustration of an owl with mushrooms and other fauna growing from its head. The sender, Michele, knew Jerry from Coffee Tree Roasters. Michele recalls how Jerry's sweet smile and bright bow ties made a positive impact on her life. Michele illustrated a second bow tie in the upper right corner of the tag.

Laminated printed signs in blue and green ink on paper. The signs urge the reader to "Show solidarity" and "stand up for our common values, today tomorrow and always." An illustration of three stylized people raising their hands appears in the upper center, surrounded by the words: "Kindness, Respect, Courage."

Handwritten card in colored pencil on paper. A blue and green colored globe, surrounded by alternating male and female stick figures in purple, red, and yellow, appears in the center. The globe is inscribed: "We are thinking of YOU!!" The upper and lower edge of the card reads, in Hebrew: "Am Yisrael Chai"(the People of Israel live). Four Stars of David appear on either side of the globe. Signed: "Hannah S. 8th grade at Yeshivat Noam."