In 1940, Carigiet was approached by the Romansh-speaking author Selina Chönz who asked him to illustrate her story "Uorsin" to create a children's picture book. After several years of hesitating, Carigiet finally agreed, and spent several weeks sketching the scenery and architecture in Guarda, Chönz's home village in the Lower Engadin, after which he modeled the protagonist's village. In October 1945 the book was published in German as "Uorsin (Schellen-Ursli. Ein Engadiner Bilderbuch)" and later in English as "A Bell for Ursli" (1950). The story follows the boy Ursli's perilous climb through snow to an abandoned summer hut in order to retrieve a large "trychel" for the annual Chalandamarz celebration on 1 March. The book has been translated into ten languages with total sales estimated around 1.7 million worldwide. Carigiet's dramatic and colorful compositions were noticed and positively reviewed by art critics including Manuel Gasser in "Graphis Inc." or Linus Birchler, editor-in-chief of the series "Art Monuments of Switzerland" and member of the Swiss Federal Art Commission.