The following extract from the famous Casket Letters (which were in part responsible for the conviction of Mary Queen of Scots), mentions a "Houstoun". Anyone happen to know who this Houston might have been?
Source of Casket Letters transcription, "The Letters In The Casket" http://ladyhedgehog.hedgie.com/casketletters.html
"Sir James Hamilton came to meet me, who told me that at another tyme he went his way when he heard of my comming, and that he sent unto him Houstoun, to tell him that he wold not have thought, that he wold have followed and acompany himself with the Hamiltons. He answered that he was not come but to see me; and that he would not follow Stuart nor Hamilton, but my commandment. He prayed him to go speak to him; he refuses it.
The Lord Luce, Houstoun and the sonne of Caldwell, and about xlty horse came to meet me that he was sent to one day o'law from the father, which shold be this day against the signing of his own hand, which he has, and that, knowing of my comming, he hath delayed it, and hath prayed him to go see him, which he hath refused, and give aith that he will suffer nothing at his hands. Not one of the town is omce to speak with me, which makith me to thkn that they be his, and they so speakith well of them, at least his sonne."