„Hier Biriar Saugo af Claro | keisara syne“
Paper.
Written in double columns.
AM 181 fol is written in Útskálar, Iceland between 1638 and 1652 ( Slay 1972 23a).
Other datings:
AM 181 fol. belonged to the man who commissioned the manuscript, Þorsteinn Björnsson (1612-75). Subsequently lögmaður Sigurður Björnsson took it into possession.
AM 181 a-l fol. once belonged to the same codex but they were divided into smaller components and AM 181 d and g-l fol. are now transferred to Iceland.