Of course, to-day it is difficult to controvert these statements, even if inclined to do so; but the languages spoken by the Chaco Indians are amongst the most difficult to learn of any spoken by the human race, so much so that Father Dobrizhoffer, in his ‘History of the Abipones’, says ‘that the sounds produced by the Indians of the Chaco resembled nothing human, so do they sneeze, and stutter, and cough.’ In such a language the Athanasian Creed itself would be puzzling to a neophyte. He also says that several of the Jesuits who had laboured for years amongst the Indians could never master their dialects, and when they preached the Indians received their words with shouts of laughter. This the good priest attributed to the presence of a ‘mocking devil’ who possessed them. It may be that the mocking devil was but a sense of humour, the possession of which, even amongst good Christians, has been known to give offence. But be this as it may, San Francisco de Solano remained two years at Asuncion, though whilst he lived there his powers of speech (according to the Jesuits) seem to have been diminished, and he held no communication with the Indians in their own languages. It may be that, like St. Paul, he preferred to speak, when not with Indians, five words with his understanding rather than ten thousand in an unknown tongue. At the time of the first conquest Paraguay was almost entirely peopled by the Guaraní race.[29] It does not appear that their number was ever very great, perhaps not exceeding a million in the whole country. From the writings of Montoya, Guevara, Lozano, and the other missionaries of the time, it is certain that they had attained to no very high degree of civilization, though they were certainly more advanced than their neighbours in the Gran Chaco. It is most probable that they had not a single stone-built town, or even a house, or that such a thing existed south of New Granada, to the eastward of the Andes, for we may take the description in Schmidel’s ‘History of the Casa del Gran Moxo’[30] either as a mistake or as a story which he had heard from some Peruvian Indian of the palaces of the Incas. At any rate, no remains of stone-built houses, still less of palaces, are known to have been found in Brazil or Paraguay.