man again, some of my doubt dispelled during the night.
Down on the dark plain there was a flash of light. Sally at her place beyond the grove again, probably lonely and a little scared in the African darkness with its night rustlings and animal cries. I flashed my torch down at her to reassure her, and the dawn started coming on quickly.
Dawn was a thing of soft pinks and roses, misty mauves and mulberry - then the sun burst up above the horizon and the bees began to fly. For twenty minutes I watched them to decide the pattern and purpose of their flight, There was a fan of workers winging wide out over the plain. These were the pollen-gatherers. I established this by leaning out and watching their return, through the binoculars, checking the bunches of yellow pollen on their hind legs as they alighted on the protruding bulge of the crack.
In doing so I discovered another pattern of flight that I might have missed. A steady stream of workers was dropping almost vertically down towards the dark foliage of the silent grove below me - and on their return there was no pollen on their legs. Water-carriers then! I signalled Sally in towards the base of the cliff, this morning our roles were reversed by the slant and angle of the sun's rays. After a while she waved to let me know she had spotted them, and I began the laborious climb down to the plain.
She had to point out to me the indistinct flight of bees down the cliff towards the grove, but even then the shadow cast by the cliff caused them to vanish before we could establish their exact destination within the grove. We watched them for thirty minutes, then gave it up and went into the trees to search at random.
By noon I could swear that there was no sign of surface water within the environs of the grove. Sally and I flopped down side by side with our backs to the sturdy trunk of one of the mhoba-hoba trees, the wild loquat tree that legend states the ancients brought with them from their homeland, and we looked at each other in despair.
'Another blank!' She was perspiring in a light dew across her forehead and temples and a dark curl was plastered to the skin. With one finger I pushed it gently back and tucked it behind her ear.
'It's here, somewhere. We'll find it,' I told her with the confidence I did not feel. 'It's got to be here. It just has to be.'
She was about to answer me, when I pressed my fingers to her lips to silence her. I had seen movement beyond the last trees of the grove. We watched the troop of vervet monkeys crossing the open plain at a gallop with their tails in the air. As they reached the grove they shot up the trunk of the nearest tree with comical relief. Their little black faces peered down anxiously from the massed green foliage, but they did not notice us sitting quietly at the base of the mhoba-hoba.
Confidently now they moved across the tree-tops towards the cliff, the big males leading while the mothers, with infants slung beneath their bodies, and the rabble of half-grown youngsters followed them.
They reached the top branches of a gargantuan wild fig tree, one of those whose roots and trunk were embedded in the vertical cliff wall of red rock, and whose branches spread wide and green fifty feet above the earth - and they began to disappear.
It was an astonishing phenomenon, sixty monkeys went into the tree and dwindled swiftly until the branches were deserted. Not a single monkey was left.
'What happened to them?' whispered Sally. 'Did they go up the cliff?'
'No, I don't think so.' I turned to her grinning happily. I think we've found it, Sal. I think this is it, but let's just wait for the monkeys to come back.'
Twenty minutes later the monkeys suddenly began reappearing in the branches of the wild fig again. The troop moved off in a leisurely fashion along the cliff, and we waited until they were all out of sight before we went forward.
The convoluted and massed roots of the wild fig formed a flight of irregular steps up