Melville's Memoirs, p. 158.

All this while I lay in the castle of Edinburgh, praying night and day for her Majesty's good and happy delivery of a fair son. This prayer being granted, I was the first that was advertised by the Lady Boyne {Mary Beaton, just married to Ogilvie of Boyne}, in her Majesty's name to part with diligence, the 19th day of June in the year 1566, between ten and eleven hours before noon. It struck twelve hours when I took my horse, and was at Berwick that same night. The fourth day after, I was at London, and met first with my brother, who sent and advertised the Secretary Cecil that same night of my coming and of the birth of the Prince, willing him to keep it up, until my being at Court to show it myself unto her Majesty, who was for the time at Greenwich, where her Majesty was in great merriness and dancing after supper; but so soon as the Secretary Cecil rounded the news in her ear of the Prince's birth all merriness was laid aside for that night, every one that were present marvelling what might move so sudden a changement; for the Queen sat down with her hand upon her haffet {cheek}, and bursting out to some of her ladies, how that the Queen of Scotland was lighter of a fair son, and that she was but a barren stock.... The next morning was appointed unto me to get audience ... she ... said, that the joyful news of the Queen her sister's delivery of a fair son, which I had sent unto her by Master Cecil, had recovered her out of a heavy sickness which has held her fifteen days. Therefore she welcomed me with a merry volt {countenance}, and thanked me for the diligence I had used. All this she said before I had delivered unto her my letter of credence. After that she had read it, I declared how that the Queen had hasted me towards her Majesty, whom she knew of all other her friends would be gladdest of the good news of her birth, albeit dear bought with the peril of her life; for I said that she was so sore handled in the meantime that she wished never to have been married. This I said to give her a little scare to marry, by the way; for so my brother had informed me, because she boasted sometimes to marry the Archduke Charles of Austria, when any man pressed her to declare a second person {heir}. Then I requested her Majesty to be a gossip unto the Queen, for our cummer are called gossips in England; which she granted gladly to be.

Herries's Memoirs, p. 79. (Abbotsford Club.)

About two o'clock in the afternoon the King came to visit the Queen, and was desirous to see the child. "My Lord," says the Queen, "God has given you and me a son, begotten by none but you!" At which words the King blushed, and kissed the child. Then she took the child in her arms, and discovering his face, said, "My Lord, here I protest to God, and as I shall answer to Him at the great day of judgment, this is your son, and no other man's son! And I am desirous that all here, with ladies and others, bear witness; for he is so much your own son, that I fear it will be the worse for him hereafter!" Then she spoke to Sir William Stanley. "This," says she, "is the son whom (I hope) shall first unite the two kingdoms of Scotland and England!" Sir William answered, "Why, Madam? Shall he succeed before your Majesty and his father?" "Because," says she, "his father has broken to me." The King was by and heard all. Says he, "Sweet Madam, is this your promise that you made to forgive and forget all?" The Queen answered, "I have forgiven all, but will never forget. What if Faudonside's pistol had shot, what would have become of him and me both? or what estate would you have been in? God only knows; but we may suspect." "Madam," answered the King, "these things are all past." "Then," says the Queen, "let them go."