What protections does Master Thomas offer Frederick from Covey?

Master Thomas offered NO protection.

"I suppose I looked like a man who had escaped a den of wild beasts, and barely escaped them. In this state I appeared before my master, humbly entreating him to interpose his authority for my protection. I told him all the circumstances as well as I could, and it seemed, as I spoke, at times to affect him. He would then walk the floor, and seek to justify Covey by saying he expected I deserved it. He asked me what I wanted. I told him, to let me get a new home; that as sure as I lived with Mr. Covey again, I should live with but to die with him; that Covey would surely kill me; he was in a fair way for it. Master Thomas ridiculed the idea that there was any danger of Mr. Covey's killing me, and said that he knew Mr. Covey; that he was a good man, and that he could not think of taking me from him; that, should he do so, he would lose the whole year's wages; that I belonged to Mr. Covey for one year, and that I must go back to him, come what might; and that I must not trouble him with any more stories, or that he would himself GET HOLD OF ME. After threatening me thus, he gave me a very large dose of salts, telling me that I might remain in St. Michael's that night, (it being quite late,) but that I must be off back to Mr. Covey's early in the morning; and that if I did not, he would get hold of me, which meant that he would whip me."