6th. — We proceeded due south, and slept at Rancagua.

Captain Arcoll helped himself to a drink. 'You can guess what that story was, Mr Crawfurd. At full moon when the black cock was blooded, the Reverend John forgot his Christianity. He was back four centuries among the Mazimba sweeping down on the Zambesi. He told them, and they believed him, that he was the Umkulunkulu, the incarnated spirit of Prester John. He told them that he was there to lead the African race to conquest and empire. Ay, and he told them more: for he has, or says he has, the Great Snake itself, the necklet of Prester John.'

Neither of us spoke; we were too occupied with fitting this news into our chain of knowledge.

Captain Arcoll went on. 'Now that I knew his purpose, I set myself to find out his preparations. It was not long before I found a mighty organization at work from the Zambesi to the Cape. The great tribes were up to their necks in the conspiracy, and all manner of little sects had been taken in. I have sat at tribal councils and been sworn a blood brother, and I have used the secret password to get knowledge in odd places. It was a dangerous game, and, as I have said, I had my adventures, but I came safe out of it - with my knowledge.

'The first thing I found out was that there was a great deal of wealth somewhere among the tribes. Much of it was in diamonds, which the labourers stole from the mines and the chiefs impounded. Nearly every tribe had its secret chest, and our friend Laputa had the use of them all. Of course the difficulty was changing the diamonds into coin, and he had to start I.D.B. on a big scale. Your pal, Henriques, was the chief agent for this, but he had others at Mozambique and Johannesburg, ay, and in London, whom I have on my list. With the money, guns and ammunition were bought, and it seems that a pretty flourishing trade has been going on for some time. They came in mostly overland through Portuguese territory, though there have been cases of consignments to Johannesburg houses, the contents of which did not correspond with the invoice. You ask what the Governments were doing to let this go on. Yes, and you may well ask. They were all asleep. They never dreamed of danger from the natives, and in any case it was difficult to police the Portuguese side. Laputa knew our weakness, and he staked everything on it.

'my first scheme was to lay Laputa by the heels; but no Government would act on my information. The man was strongly buttressed by public support at home, and South Africa has burned her fingers before this with arbitrary arrests. Then I tried to fasten I.D.B. on him, but I could not get my proofs till too late. I nearly had him in Durban, but he got away; and he never gave me a second chance. For five months he and Henriques have been lying low, because their scheme was getting very ripe. I have been following them through Zululand and Gazaland, and I have discovered that the train is ready, and only wants the match. For a month I have never been more than five hours behind him on the trail; and if he has laid his train, I have laid mine also.'

Arcoll's whimsical, humorous face had hardened into grimness, and in his eyes there was the light of a fierce purpose. The sight of him comforted me, in spite of his tale.

'But what can he hope to do?' I asked. 'Though he roused every Kaffir in South Africa he would be beaten. You say he is an educated man. He must know he has no chance in the long run.'

'I said he was an educated man, but he is also a Kaffir. He can see the first stage of a thing, and maybe the second, but no more. That is the native mind. If it was not like that our chance would be the worse.'