His rangers squatted on the deck below the gunwale and huddled into their greatcoats, for it was cold out on the water with the wind of their passage accentuating the chill of the river mist. The outboard motor was running rough and cutting out intermittently. Twice Isaac had to let the boat drift while he went back to work on it. It badly needed a full overhaul, but there was never enough foreign exchange available for spares to be imported. He got her running again and pointed the bows downstream. A thick slice of moon spiked up above the dark trees that lined the bank of the Zambezi. It gave Isaac just enough light to push the boat up to top speed. Although he knew each curve and stretch of the river intimately for the next fifty miles, right down to Tete and the Mozambique border, the shallows and rocky outcrops were too complex even for him to run in complete darkness. The glow of moonlight turned the patches of river mist to iridescent pearl dust and gave to the open water a lustre like polished black obsidian.
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