From a sermon preached by John Cosin at St. Edward's in Cambridge, January the sixth, A.D. MDCXXI; and at Coton, on the second Sunday in Epiphany:

I will not now trouble myself and you both, as many do, to tell you how many of these Magi there were, three, or more; or to tell you a tale out of Petrus de Palude how, being kings at first, they left that office for St. Thomas to make them all archbishops in their country, and how after two of them were dead, and laid close together in their graves, they started one from another to make room for the third; and how Helen, Constantine's mother, begged their bodies, of the patriarch there, and carried them to Constantinople, and front thence how they came to Millaine, in St. Ambrose days, and then to Colein at last, which makes them now to be called the Three Kings of Colein; and what their names were besides all this. These kind of speculations will do us little stead, which way soever they go. Yet for their number as I would not be too curious to search, so I would not be too boisterous to condemn and think every thing popery that we read not in the text. It hath been a very ancient tradition, (Leo hath it in his Sermons) and perhaps at the first they had better reason for it than we know of now. And for their dignity, whether they were kings or no, I cannot tell; yet Tertullian says (and Tully likewise before him) they would have no other kings there but Magi, such as these were; and it hath been an old custom of the Church (howsoever our new masters deride it) to apply that saying in the Psalms, 'The kings of Tharsis and of the isles shall bring gifts, and that in Isaiah, 'Gentiles shall walk in Thy light, and kings at the brightness of thy rising up,'–to these Wise Men. Kings! why doth not St. Matthew call then so then? There may be reason for that. It more concerns us and God too, to have Christ acknowledged by the wise, than by any king whatsoever; and perhaps he would teach us by it that the greatest honour we can have is to be wise men (it is a good use for us to make of it, at least).

Perhaps some of our brethren should think on Cosin's words when they ask where, explicitly, does Holy Writ speak of such things as Our Lady's Immaculate Conception or Assumption?