Mack Bolan was leaving a Danish restaurant in Reykjavik, Iceland, when a second attempt was made on his life. The first had been less than two hours before, as he stood waiting for a taxi outside the Icelandair terminal at Keflavik airport, on a windswept peninsula jutting into the ocean twenty miles southwest of the capital.

Bolan had flown in from Copenhagen on a short-haul flight, the kind still known locally as "internal." The Executioner preferred to use the smaller airfields on his own time, as he was now, away from the rigors of his missions, from suspicious eyes.

Lately the warrior had felt increasingly that he needed some R and R to purge the mind, the spirit and, yeah, the body. He knew that battle fatigue could bring a weary soldier down. And Bolan's commitment to his duty, his destiny, had never been halfhearted in any way. In his present mode he might as well give up the fight and let the cannibals continue their savage march on gentle civilizers.

No damn way.

Mack Bolan knew the fight could wait, but for a short time, while a mentally exhausted warrior cleared his mind.

For a short time.

And this was why Bolan had decided on a self-imposed vacation in Iceland, on top of the world. In a way he felt on top of the world already, because the decision was made on his own, and not by any gentle prodding from allies like Hal Brognola.

In Iceland the environment was pure, Bolan felt, primitive. And a man could pit his strength, his wits, against the elements, become one with nature, making him whole again.

So the Executioner had chosen Keflavik airfield, rather than the big international airport nearer the city.

These unimportant fields shared certain qualities that lent them an appearance of sameness a few incoming and outgoing flights each day, a minimum of formalities and personnel who treated passengers like humans instead of cattle.

The atmosphere at these smaller airfields was casual and relaxed.

You could exchange banter with customs and immigration officials if you had a mind to. And you could get past them with a .44 AutoMag or a Beretta more easily than at Kennedy or Heathrow. Which was a plus if you were a hunted man like Mack Bolan.

And if you happened to be carrying, as he was that day, a 93-R and an AutoMag.

Although the Executioner had no intentions of using his two favorite handguns, he felt that it didn't make sense to take unnecessary chances, especially when one was involved in a trade such as Bolan's.

And that trade was Death.

After all, he was Mack Bolan.

In Iceland, Bolan planned to make a river excursion, from source to mouth.

The river was called the Jokulsa a Fjollum. In Icelandic, the name meant "glacier-fed stream in the mountains." Its source was deep beneath the mighty Vatnajokull ice cap that covered one-twelfth of the country's surface.

At first it was channeled through subterranean tunnels melted through the base of the glacier by geothermal heat generated from volcanoes that erupted beneath the ice. Then the river emerged into a desolate landscape of ancient lava flows and twisted northward into the Arctic Ocean through 130 miles of precipitous gorges punctuated by violent rapids and four major waterfalls.

The trip effectively a coast-to-coast journey across the island had been attempted once before, Bolan had read somewhere, by a twelve-man expedition using kayaks and inflatable rafts backed up by a snowmobile and a ULM, a gas-powered, delta-wing aircraft equipped with floats. It had taken them six weeks.

Bolan figured that if he cut the time by half and made the crossing alone in a single kayak, that would prove a sufficient test for his guts and his initiative. He would use an ULM only to ferry him from Egilsstadir, the nearest airfield, to the vast sinkhole in the ice that was the only entry to the source of the underground river.

Because he had to supervise the unloading of the crated ULM from the hold of the old 727 that had brought him from Denmark, and check out papers with the Icelandic customs, he had missed the airport bus that would have taken him to the city center.

When he was through, he walked out of the superheated, cigar-smelling terminal and crossed a paved sidewalk toward the steel-and-glass canopy sheltering the taxi stand.

No cabs.

He looked around him. A veil of high-flying cirrus hid the sun. Below the barren promontory on which the airfield was located, gray waves crumbled into dirty white foam as the wind whipped the surface of the sea. On the far side of the inlet, he could see the snowcapped mountains behind Reykjavik.

Behind him, there was one vehicle in the parking lot a dark blue Ford into which the customs and immigration officers were climbing. The vehicle bumped across the lot, turned through the gates and took the highway leading to Reykjavik. He went back into the terminal.

There was no one around. A group of geology students who had been on the plane had taken the bus into the city.

The 727 had left on the last leg of its flight to Scotland, carrying with it the few transit passengers who had been thronging the duty-free store in search of cheap whiskey and Brennavin, the pungent Icelandic liquor. Through the PA speakers a lone unaccompanied alto saxophone lamented the loneliness of man.

But the ticket counter with its stack of blank forms was deserted, unlocked doors to the empty administration offices stood open, a steel grill blocked off the bar. The next plane was not due until dusk, and the airport personnel had gone back to town.

Bolan walked unchallenged past the immigration desk into the departure lounge. Through wide glass windows he stared at two Cessna executive jets parked on the apron. In the distance a lighthouse on the tip of the headland pointed a single finger at the cold sky.

Nearer, a tractor towing a string of baggage trailers trundled through the open doors of a maintenance hangar. A man in white coveralls rolled shut the hangar doors and left the field as deserted as the terminal.

Beyond the perimeter, a chain link fence enclosed a group of low yellow buildings marking the site of the US naval base built during the American occupation of Iceland in World War II.

The technicians stationed there now under a NATO agreement were part of a high-tech unit whose job was to monitor the movements toward the North Atlantic of Russian warships, nuclear submarines, trawlers and the huge fishing-factory ships that so often themselves were no more than covers for sophisticated electronic surveillance equipment.

Bolan hoped there were not too many spooks on detail there. He was, he knew, on the hit list not only of foreign agencies such as the KGB, the SDEC, and Britain's MI-6 but also of the CIA and the National Security Agency. It would sure cramp his style if any one of those guys knew he was in Iceland even if it was for a vacation.

He turned back into the waiting room.

It still smelled of cigar smoke and stale coffee. There was a copy of the country's biggest daily newspaper lying open on a bench. He picked it up and turned to the classified section. He found what he wanted on the second page an advertisement for a taxi service in the city. He went to a pay phone, dropped in a coin and dialed the number.