[And here he'd thought the biggest test of friendship was behind him...]

Yes.

[Significant pause.]

I am.

[Time to come clean regarding this.]

Randor is my brother. My younger, half-brother.

[Which, if he's playing his cards right, should convey what he means to convey: Keldor is a prince, a high-born noble, and, if titles follow the same rules in Radley's world as it does in Keldor's, that right now he should be king.

All this makes him a touch anxious, but he hopes he's hiding it well.]