NOW I’m ready! :-)

“The enduring symbol of the Camino is the scallop shell. In the colors of blue and yellow its representation marks the way for all travelers. The Shell of Saint James plentiful on the shores of the Atlantic was physical proof a pilgrim had walked to Fistera (end of the earth). It also served as a drinking vessel, too. The people of Spain will open their doors and hearts to a traveler with this icon of faith.”
//caminobuddies.com/way-of-st-james/

“The paths of the Camino are marked with engravings of a shell, which is cool because it represents all the paths arriving at the same spot.”
//noralaexploradora.wordpress.com/2011/09/11/el-camino-de-santiago-as-promised/
(scroll down to see illustration of the shell symbol)