information, where there were no secrets. In these games, be said, there was always an optimum strategy. That was what he was looking for: optimum strategies. Chess is a game of perfect information, so is tick-tack-toe. Games of perfect information can be infinitely complex or comparatively straightforward. The only condition was that there had to be no secrets. Poker isnât a game of perfect information. Poker is a two-person, zero-sum game without perfect information. âJust like marriage,â Hope said. He still disagreed .
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I was ready, early the next morning, when Ian Vail came by to pick me up. There was a dirt road that took you a mile or so into the heart of the northern area. It saved a lot of time: a fifth to a quarter of my day was spent in commuting to and fro.
As we drove off Vail told me that he had sent two of his field assistants ahead at first light with walkie-talkies to look for the chimps. With a bit of luck, he said, we might be able to cover most if not all of the northern chimp population in a day. I was very much aware of the aftereffects of my encounter with Mallabar the night before. I asked Vail if he had spoken of our trip to anyone. He looked at me, a little surprised.
âNo,â he said. âWhy?â
âMallabar thinks it wasnât a baby chimp. That body. He says it was a baboon.â
âAnd you donât agree.â
âItâs not a question of agreeing. Iâm right, heâs wrong.â
Vail made a face. âLook, Hope, maybe you shouldnât tell me any more, you know? Eugene has been extraordinarilyâ¦I just donât want to have to take sides.â
I smiled to myself: very Ian Vail. âOh, donât worry,â I said. âIâll keep your name out of it. Just a professional disagreement.â
âHe must have his reasons. I mean, if youâre right.â
âI am and he has. Though Iâve no idea what they are.â
I sensed Vailâs deepening worry: what was he getting into here? To what extent, by aiding me in this way, might he be going counter to his benefactorâs wishes?
âItâs awkward for me, thatâs all,â he said feebly. âWith Roberta and all that.â
Roberta Vail. Ianâs American wife and Mallabarâs amanuensis and uncredited coauthor. Roberta worshiped Mallabarâthe term was not too strongâand everyone knew it, even though her adoration was couched in terms of proper professional awe. Perhaps, I thought now, it was Robertaâs fervent devotion to Eugene that had made Ian Vail try to kiss me that dayâ¦. I realized, also, that Roberta had better not learn of this tripânot because she distrusted her husband (she didnât), but because of its implicit disloyalty to the God Eugene. However, that was one confidence I knew our Ian wouldnât divulge.
We parked the Land-Rover and set off up the path into the low hills that climbed toward the grasslands of the plateau. We were now right in the middle of the Grosso Arvore National Park, an area of approximately one hundred square miles. Our particularterritory, where the northern group of chimpanzees were situated, was smaller, a strip of forest and scrub approximately ten miles long and two miles wide. It supported a fluctuating population of between thirty and forty chimpanzeesânow reduced somewhat by the migration of my southerners.
About half of the northern chimps had been spotted by one of Vailâs assistants, so we were informed over our walkie-talkies. We made good progress. It took us only about half an hour to reach them. I noticed how the going here in the north was far easier; there was little of the thick forest or dense undergrowth that I encountered in the south.
We were lucky to find so many of the chimpanzees together at one site. The reason was that three large dalbergia trees grew here and the flowers were in bud. I counted fourteen chimpanzees sitting