I read this book growing up in the mid-1970s and would love to identify it for a re-read. The copy I read seemed old-ish at the time, so my guess is that it is likely from the 1960s (or possibly earlier, but I don't know there was much of this sort of fantasy published pre-Tolkien, although this had no elves or trolls or anything so far as I remember, just human characters). I recall it as a very trope-y, third person point of view story of an adolescent boy in a medieval-ish setting who has to leave where he's grown up because of some danger or trouble, and in his journey is accompanied by a mysterious older man. There is much trouble in the land because the throne is empty, and there is some sort of search or prophecy to identify the true heir. The boy thinks that the older man must be the true king, but of course in the end it turns out to be the boy.
I realize the above is not much to go on, but the one detail that I recall quite strongly is that to be confirmed as the heir, the person must be at a certain place that's basically on top of a hill or cliff or something right at dawn (precursor of He Who Comes With the Dawn from Wheel of Time?), but the boy is injured or something and so basically the older man carries the boy up there through the night to be in the right place at the right time and then huzzah huzzah all is well.
Also I have a vague recollection that the word "Glory" might be in the title but I'm definitely not certain of that. Any pointers/possibilities would be greatly appreciated.
