Before his departure on his first voyage of discovery there is absolutely no temporary record of him except a few dates in notarial registers.

The circumstances of his life and his previous conditions were supplied afterwards by himself and his contemporaries; and both he and they saw the past in the light of the present, and did their best to make it fit a present so wonderful and miraculous.

The whole trend of recent research on the subject of Columbus has been unfortunately in the direction of proving the complete insincerity of his own speech and writings about his early life, and the inaccuracy of Las Casas writings his contemporary biographer, and the first historian of the West Indies.
Those of my readers, then, who are inclined to be impatient with the meagreness of the facts with which I am presenting them, and the disproportionate amount of theory to fact with regard to these early years of Columbus, must remember three things.

First, that the only record of the early years of Columbus was written long after those years had passed away, and in circumstances which did not harmonise with them; second, that there is evidence, both substantive and presumptive, that much of those records, even though it came from the hands of Columbus and his friends, is false and must be discarded; and third, that the only way in which anything like the truth can be arrived at is by circumstantial and presumptive evidence with regard to dates, names, places, and events upon which the obscure life of Columbus impinged.

Columbus is known to have written much about himself, but very little of it exists or remains in his own handwriting.