Disagreeing with the venerable Bishop, I find in the above statements the most valuable indications of the former existence of two centres of culture in Yucatan. There is a curious affinity between the name Zilan (pronounced Dzilan) and Chilan given as “the title of a priestly office which consisted of a juridistic astrology and divination,” by Landa. There may even be a connection between zilan and zian=origin, commencement; zihnal=original and primitive, which may be worthy of consideration in association with the well-known statement, quoted by Dr. Brinton, that “the most venerable traditions of the Maya race claimed for them a migration from Tollan in Zu-iva—thence we all came forth together, there was the common parent of our race; thence came we from amongst the Yagui men, whose god is Yolcuatl Quetzalcoatl.” Dr. Brinton adds that “this Tollan is certainly none other than the abode of Quetzalcoatl named in an Aztec manuscript as ‘Zivena Uitzcatl.’ ” Vague as any conjecture must necessarily be, I cannot but deem it of utmost importance that systematic excavations be made, some day, at Zilan, for the purpose of bringing to light the stelæ referred to by the native informants of Bishop Landa. According to Brasseur de Bourbourg “Zilan, situated at about 20-½ leagues from Merida belonged to the Cheles people.(59) It is the seaport of Izamal and contains the ruins of one of the greatest pyramids or artificial mounds (omul) in Yucatan,” a fact which corroborates the view that it was an ancient important capital. The northern coast of Yucatan is extremely remarkable for it is divided from the Gulf of Mexico by a continuous strip of land between which and the mainland there is a narrow channel of water. There are two openings only in this zone of land which afford a passage into the navigable channel. One of these openings is situated almost opposite to Zilan and is known as the Boca de Zilan. At a short distance to the east there is a second such “boca” opposite to the mouth of the Rio Lagartos, which is a large estuary and the only river on the northern coast of Yucatan.(60)