Also known as The Time of Transit, and Transitumini, Thelvol Hatty Haynu marks the time during which Tarvu travelled for 5 years, between the ages of 9 and 14. It is not clear as to where he went exactly. Tarvu suffered stomach illness during this time and had bad diarrohea.
Above: A typical human stomach. Tarvu's would have been in much greater working order, being the Lord.