An account of the expedition to Cibola which took place in the year 1540, in which all those settlements, their ceremonies & customs, are described. Written by Pedro de Castaneda, of Najara.

...May it please our lord to so favor me that with my slight knowledge and small abilities I may be able, by relating the truth, to make my little work pleasing to the learned and wise readers, when it has been accepted by Your Grace. For my intention is not to gain the fame of a good composer or rhetorician, but I desire to give a faithful account and to do this slight service to Your Grace, who will, I hope, receive it as from a faithful servant and soldier who took part in it. Although not in a polished style, I write that which happened -- that which I heard, experienced, saw, and did... (Complete intro can be seen on the following URL):  

http://www.pbs.org/weta/thewest/resources/archives/one/corona1.htm

CHAPTER I.
The way we first came to know about the Seven Cities, and how Nuno de Guzman made an expedition to discover them.

IN THE year 1530, Nuno de Guzman, who was President of New Spain, had in his possession an Indian, a native of the valley or valleys of Oxitipar, who was called Tejo by the Spaniards... the son of a trader.. As a boy Tejo journey with his father once or twice and saw some very large villages, which he compared to Mexico. He had seen seven very large towns which had streets of silver workers. The way... was up through the country between two seas, following a nothern direction. ...Nuno de Guzman got together nearly 400 Spaniards and 20,000 friendly Indians of New Spain, to search for "The Seven Cities."

Traveling from Mexico they had reached the province of Culiacan, where his government ended and where the New Kingdom of Galicia is now, they found the mountain chains impassible and after many days they grew anxious to return. Besides this, Nuno de Guzman received word that the Marquis of the Valley, Don Fernando Cortes, had come from Spain with his new title, and with great favors and estates, and as Nuno de Guzman had been a great rival of his at the time he was president, and had done much damage to his property and to that of his friends, he feared that Don Fernando Cortes would want to pay him back in the same way, or worse. So he decided to establish the town of Culiacan there and to go back with the other men, without doing anything more.

After his return from this expedition, he founded Xalisco, where the city of Compostela is situated, and Tonala, which is called Guadalaxara, and now this is the New Kingdom of Galicia. The guide they had, who was called Tejo, died about this time, and thus the names of these Seven Cities and the search for them remain until now, since they have not been discovered.

See the entire account of  Pedro de Castaneda, of Najara at URL 

http://www.pbs.org/weta/thewest/resources/archives/one/corona1.htm