When members of the Class of 2018 leave Stanford next week, many will leave something very special behind.

Following a tradition that dates to 1896, graduating seniors have shared their treasured items, which will be installed in a time capsule and buried beneath the Class Plaque – a bronze “18” – near the west gate of the Main Quad.

Among this year’s treasured items: cloth leaves from the Stanford Tree mascot’s costume, a classroom clicker, seeds from campus trees, a well-loved straw cowboy hat and the key ingredient for boba tea along with a recipe.

University photographer Linda Cicero captured images of a few dozen examples of what will help explain the Class of 2018 to the future.