This suggests that Thai massage must have been in practice among Thais well before the reign of King Narai. Proof of the true date of origin in Thailand remains unclear, however. Even though authors of several Thai texts have indicated that Thai massage was mentioned in a stone inscription of the ancient Sukhothai era, such epigraph was not available on any stone inscription discovered at that time. Several inscriptions unearthed during this era give evidence of traditional medicine but there is no direct link to Thai massage.