Polydore Vergil, Historiae Anglicae Libri. P. V. was an Italian who came to England in 1502. For the earlier years of Henry VII. he had access to good sources of information; for the latter years he was a witness, but with the inevitable limitations of a foreign observer.
INTERMEDIATE
Bacon, Francis, History of the Reign of King Henry VII. This has been the basis of all the popular histories, for the reign. It is often referred to as "contemporary". But Bacon was not born till fifty years after Henry's death, and did not write the history till he was over fifty himself. His work contains much that is merely rhetorical amplification of above named contemporary authorities, with occasional imaginative variations and misreadings: nor does he appear to have had additional sources of information.
Ware, De Hibernia; a supplement to which contains annals of Irish
History in the reign of Henry VII.; written in the time of Charles I.
MODERN
Busch, Wilhelm, England under the Tudors, vol. i., Henry VII.
Translated by A. M. Todd. The one complete and thorough account of the
reign, with an exhaustive examination of the authorities: and notes by
J. Gairdner.
Gairdner, J., Henry VII. (Twelve English Statesmen series), an admirable study but with less detail; written before Busch's work was published.
Seebohm, F., The Oxford Reformers, Colet, Erasmus and More: an illuminating study.