sentences:  It is evident therefore that the Gajabahu referred to in the Cilappathikaram could not be Gajabahu II, but must have been Gajabahu I, who was king of Ceylon from about A.D. 113 to A.D. 125.This, in turn, has been used to imply that the Chera king kuttuvan, who, according to the "Pathirruppaththu" ruled for 55 years may be dated to c. 110 - 165 CE.This computation, which was first proposed by V Kanakasabhai Pillai in his book, "The Tamils 1800 years ago (1904)", has come to be known as the "Gajabahu synchronism".