The manuscript “Graduale ad usum ecclesiae Sancti Deodati” is dated 1504–1514, and is kept in the Bibliothèque Municipale in Saint-Dié-de-Vosges, France . This book, containing the musical parts of the Mass, has many illuminated borders, miniatures and initials.
One of the initials, on folio 53r, shows four snails in two pairs. All are stylised and have an eye-spot. Their tentacles are schematic, three of the snails have two pairs of short tentacles (thus six in total). Two shells are sinistral, two dextral.
 Saint-Dié-de-Vosges BM, Ms. 074, 360+ ff [no description of manuscript]. http://bit.ly/1nBK5X5 (18.iii.2014).