The term 'Icelandic Volume' refers to the Edda, a collection of Old Norse poems and stories from Iceland. The Edda was written in the 13th century and is considered one of the most important sources for understanding Norse mythology and culture. It is divided into two parts: the Poetic Edda and the Prose Edda. The Poetic Edda contains mythological and heroic poems, while the Prose Edda contains a manual of poetics and other works.