All in all, a classic delinquent, with that history of messianic delusions and social maladjustment found in regicides throughout history. The choice of Mr Reagan reflects the persistent appeal of the theme of presidential assassination, which seems to play on the edgy dreams of so many lonely psychopaths. Invested in the President of the United States, the world’s most powerful leader, are not only the full office and authority of the temporal world, but the very notion of existence itself, of the continuum of time and space which encloses the assassin as much as his victim. Like the disturbed child seeking to destroy everything in its nursery, the assassin is trying to obliterate those images of himself which he identifies with his perception of the external universe. Suicide would leave the rest of existence intact, and it is the notion of existence, incarnated in the person of the President, that is the assassin’s true target.

The Dream of Death by Air in the Second Fall, their attempt to escape from their home planet, the peoples of the earth invite their planetary death, choosing the zero gravity of a false space and time, recapitulating in their weightlessness the agony of the First Fall of Man COSMOLOGICAL TESTAMENT, BOOK I The Dream of Death by Water — the sea is an exposed cerebral cortex, the epidermis of a sleeping giant whom the Apollo and Skylab astronauts will awake with their splashdowns. All the peoples of the planet will walk, fly, entrain for the nearest beach, they will ride rapids, endure hardships, abandon continents until they at last stand together on the terminal shore of the world, then step forward.

14 October 1987. The Boy has escaped! An urgent call this morning from Governor Henson. I flew up to Daventry immediately in the crowded Home Office helicopter. Matthew Young has vanished, in what must be one of the most ingenious escape attempts ever devised. The Governor and his staff were in a disoriented state when I arrived. Henson paced around his office, pressing his hands against the bookshelves and re-arranging the furniture, as if not trusting its existence. Home Office and Special Branch people were everywhere, but I managed to calm Henson and piece together the story.

Since my previous visit they had relaxed Young’s regime. Mysteriously, the Samuel Palmer illustration in Sotheby’s catalogue had somehow calmed him. He no longer defaced his cell walls, volunteered to steamhose them, and had pinned the Palmer above his bunk, gazing at it as if it were a religious icon. (If only it were a Keating — the old rogue would have been delighted. As it happens, Keating’s reputation as a faker may have given Young his plan for escape.)

Young declined to enter the exercise yard — the high British Telecom aerials clearly unsettled him — so Henson arranged for him to use the prison chapel as a recreation room. Here the trouble began, as became clear when the Governor showed me into the chapel, a former private THE OBJECT OF THE ATTACK cinema furnished with pews, altar, pulpit, etc. For reasons of security, the doors were kept locked, and the warders on duty kept their eyes on Young by glancing through the camera slit in the projection room. As a result, the warders saw the interior of the chapel from one perspective only. Young had cunningly taken advantage of this, rearranging the pews, pulpit and altar table to construct what in effect was an Ames Room — Adelbert Ames Jr, the American psychologist, devised a series of trick rooms, which seemed entirely normal when viewed through a peephole, but were in fact filled with unrelated fragments of furniture and ornaments.

Young’s version of the Ames Room was far more elaborate. The cross and brass candelabra appeared to stand on the altar table, but actually hung in mid-air ten feet away, suspended from the ceiling on lengths of cotton teased from his overalls. The pews had been raised on piers of prayer books and Bibles to create the illusion of an orderly nave. But once we left the projection room and entered the chapel we saw that the pews formed a stepped ramp that climbed to the ventilation grille behind the altar table. The warders glancing through the camera slit in the projection room had seen Young apparently on his knees before the cross, when in fact he had been sitting on the topmost pew in the ramp, loosening the bolts around the metal grille.

Henson was appalled by Young’s escape, but I was impressed by the cleverness of this optical illusion. Like Henson, the Home Office inspectors were certain that another assassination attempt might be made on Her Majesty. However, as we gazed at that bizarre chapel something convinced me that the Queen and the President were not in danger. On the shabby wall behind the altar Young had pinned a dozen illustrations of the American and Russian space programmes, taken from newspapers and popular magazines. All the photographs of the astronauts had been defaced, the Skylab and Shuttle craft marked with obscene graffiti. He had constructed a Black Chapel, which at the same time was a complex escape device that would set him free, not merely from Daventry, but from the threat posed by the astronauts and from that far larger prison whose walls are those of space itself.

Colonel Thomas Jefferson Stamford, USAF (ret.). Born 1931, Brigham City, Utah. Eagle scout, 1945. B.S. (Physics), Caltech, 1953. Graduated US Air Force Academy, 1957. Served Vietnam, 1964-9. Enrolled NASA 1970; deputy ground controller, Skylab III .1974, rumoured commander of secret Apollo 20 mission to the Moon which landed remote-controlled nuclear missile station in the Mare Imbrium. Retired 1975, appointed vice-president, PepsiCola Corporation .1976, script consultant to 20th Century-Fox for projected biopic Men with Fins.

1977, associated with the Precious Light Movement, a California-based consciousness-raising group calling for legalisation of LSD. Resigned 1978, hospitalised Veterans Administration Hospital, Fresno. On discharge begins nine months retreat at Truth Mountain, Idaho, interdenominational order of lay monks .1979, founds Spaceways, drug rehabilitation centre, Santa Monica .1980-1, associated with Billy Graham, shares platform on revivalist missions to Europe and Australia .1982, visits Windsor Castle with President Reagan .1983, forms the evangelical trust COME Incorporated, tours Alabama and Mississippi as self-proclaimed 13th Disciple .1984, visits Africa, SE Asia, intercedes Iraq/Iran conflict, addresses Nato Council of Ministers, urges development of laser weapons and neutron bomb .1986, guest of Royal Family at Buckingham Palace, appears in Queen’s Christmas TV broadcast, successfully treats Prince William, becomes confidant and spiritual adviser to Princess Diana. Named Man of the Year by Time Magazine, profiled by Newsweek as ‘Space-Age Messiah’ and ‘founder of first space-based religion’.

Could this much-admired former astronaut, a folk hero who clearly fulfilled the role of a 1980s Lindbergh, have been the real target of the Windsor attack? Lindbergh had once hob-nobbed with kings and chancellors, but his cranky political beliefs had become tainted by proNazi sentiments. By contrast Col. Stamford’s populist mix of born-again Christianity and anti-communist rhetoric seemed little more than an outsider’s long shot at the White House. Now and then, watching Stamford’s rallies on television, I detected the same hypertonic facial musculature that could be seen in Hitler, Gaddafi and the more excitable of Khomeini’s mullahs, yet nothing worthy of the elaborate assassination attempt, a psychodrama in itself, that Matthew Young had mounted in his Lilienthal glider.