Muster Book (IMAGE) University of Washington Caption Muster books -- such as this one from the Culloden -- contain information about all the individuals aboard a ship, including name, place and country of birth, nature of recruitment (volunteer or impress), desertion, discharge and death and age at entry onboard. Muster books were usually updated weekly. Credit Steven Pfaff, University of Washington Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.