’And you didn’t step across to take a squint at your next-door neighbour?’

‘We did,’ said the professor.  ’But he had gone, leaving his fire burning, his meal cooking.’

Howard’s eyes travelled swiftly to Helen, then back to her father.

‘And he didn’t come back?’

‘He did not,’ said Longstreet.  ’Otherwise I should not have asked if you were he.’

Even yet Howard gave no direct answer.  Instead he turned his back and strode away to the deserted camp site.  Helen watched him through the bushes and noted how he made a quick but evidently thorough examination of the spot.  She saw him stoop, pick up frying-pan and cup, drop them and pass around the spring, his eyes on the ground.  Abruptly he turned away and pushed through a clump of bushes, disappearing.  In five minutes he returned, his face thoughtful.

‘What time did you get here?’ he asked.  And when he had his answer he pondered it a moment before he went on:  ’The gent didn’t leave his card.  But he broke camp in a regular blue-blazes hurry; saddled his horse over yonder and struck out the shortest way toward King Canon.  He went as if the devil himself and his one best bet in hell hounds was running at his stirrups.’

‘How do you know?’ queried Longstreet’s insatiable curiosity.  ’You didn’t see him?’

‘You saw the fire and the things he left stewing,’ countered Howard.  ’They spelled hurry, didn’t they?  Didn’t they shout into your ears that he was on the lively scamper for some otherwhere?’

‘Not necessarily,’ maintained Longstreet eagerly.  ’Reasoning from the scant evidence before us, a man would say that while the stranger may have left his camp to hurry on, he may on the other hand have just dodged back when he heard us coming and hidden somewhere close by.’

Again Howard pondered briefly.

‘There are other signs you did not see,’ he said in a moment.  ’The soil where he had his horse staked out shows tracks, and they are the tracks of a horse going some from the first jump.  Horse and man took the straightest trail and went ripping through a patch of mesquite that a man would generally go round.  Then there’s something else.  Want to see?’

They went with him, the professor with alacrity, Helen with a studied pretence at indifference.  By the spring where Helen had found the willow rod and the bluebird feather, Howard stopped and pointed down.

‘There’s a set of tracks for you,’ he announced triumphantly.  ’Suppose you spell ’em out, professor; what do you make of them?’

The professor studied them gravely.  In the end he shook his head.

‘Coyote?’ he suggested.

Howard shook his head.