He appears as prior in contemporary documents for the first time on 6 June 1199 .
According to Walter Bower Thomas was sub-prior of St Andrews Cathedral Priory when he became prior of St Andrews , sometime in 1199 .
Walter Bower Thomas appears as prior in contemporary documents for the first time on 6 June 1199 .
According to Walter Bower Thomas was sub-prior of St Andrews Cathedral Priory when he became prior of St Andrews , sometime in 1199 .