A bird in the hand is worth two in the bush. He's one more gobbler than the none you saw on the mile walk in. Good advice so far, he doesn't know what spooked him, just that something did.
I've killed several gobblers right after eating lunch or taking a break or brief nap. Why? Because I was quietly sitting or relaxing and not marching around. And what about another gobbler? If the first one doesn't reappear, there may be another one in the vacinity.
In this modern world of power scouting, incredibly realistic decoys, 70 yard guns and aggressive hunting techniques, patience is the one necessary attribute that is most often overlooked.
"The joy of living is his, who has the heart to demand it." Teddy Roosevelt