An hour later Mark Brendon had packed a bag and started in a police motor car for Paignton; but there was no more to be learned when he arrived.  Inspector Reece shared Brendon’s surprise that Redmayne had not been arrested.  He explained that fishermen and coast guards were dragging the sea, as far as it was possible to do so, beneath the cliff on which the sack had been found; but the tide ran strongly here and local men suspected the current might well have carried a body out to sea.  They judged that the corpse would be found floating within a mile or two of the Head in a week’s time, if no means had been taken to anchor it at the bottom.

Brendon called at Robert Redmayne’s lodgings after he had eaten some supper at the Singer Hotel.  There he had taken a room, that he might see and hear something of the vanished man’s future wife and her family.  At No. 7 Marine Terrace the landlady, a Mrs. Medway, could say little.  Captain Redmayne was a genial, kind-hearted, but hot-headed gentleman, she told Mark.  He was irregular in his hours and they never expected him until they saw him.  He often thus returned from excursions after the household was gone to bed.  She did not know at what hour he had come back on the previous night, or at what hour he had gone out again; but he had not changed his clothes or apparently taken anything away with him.

Brendon examined the motor bicycle with meticulous care.  There was a rest behind the saddle made of light iron bars, and here he detected stains of blood.  A fragment of tough string tied to the rest was also stained.  It had been cut—­no doubt when Redmayne cast his burden loose on reaching the cliffs.  Nothing offered any difficulty in the chain of circumstantial evidence, nor did another morning furnish further problems save the supreme and sustained mystery of Robert Redmayne’s continued disappearance.

Brendon visited Berry Head before breakfast on the following day and examined the cliff.  It fell in broad scales of limestone, whereon grew thistles and the white rock-rose, sea pinks and furze.  Rabbits dwelt here and the bloodstained sack had been discovered by a dog.  It was thrust into a hole, but the terrier had easily reached it and dragged it into light.

Immediately beneath the spot, the cliffs fell starkly into the sea—­a drop of three hundred feet.  Beneath was deep water and only an occasional cleft or cranny broke the face of the shining precipice, where green things made shift to live and the gulls built their rough nests with scurvy grass.  No sign marked the cliff edge, but beneath, on the green sea, were boats from which fishermen still dredged for the dead.  This work, long continued, had yielded no results whatever.