Francine says she was attracted to him “not quite straightaway — but soon.” Disarmed by music she has not expected to enjoy — she’s come reluctantly, at the last moment, and only to oblige her sister, who’s been given several tickets — and by the flattering stage lights, which make Leonard seem complex and shadowy, she has begun to think of him, despite the grotesqueries of his bulging throat and cheeks, as someone she might like to kiss. And she’s had fun, she says. At times his playing has become knotty, shrill, and edgy, just as she’s feared. On occasions he is more blacksmith than tunesmith. It is witty, though. And it has helped, of course, that she has rushed a few drinks in the pub beforehand and that she, and every other virgin there, has quickly recognized the common language of each tune, the program of nursery rhymes that on an impulse he has decided to play once his “Three Blind Mice” has struck such chords. “Baa, Baa, Black Sheep” follows, to more laughter and applause — initially, at least. The less sophisticated and less sober concertgoers, Francine included, have actually sung along with “Yes sir, yes sir, three bags full,” until Leonard’s tenor deprives the singers of their tune and embarks on eight measures of bare but oddly poignant bleats, loosely pitched at first, then joyously unruly.

These are the moments — the blacksmithing, the bleats — that most please and terrify Leonard, the moments of abandonment when he can sense the audience shifting and disbanding. He fancies he can see the flash of watches being checked. Certainly he can see how many in the audience are on the edges of their seats and how many more are slumped, looking at their fingernails or fidgeting. He knows he is offending many pairs of ears. They’ve come for those cool and moodily bluesy countermelodies that have made the quartet celebrated, not for these restless, heated, cranked-up overloads. But still he has to carry on, he has to nag at them, because he won’t be satisfied until he has lost and possibly offended himself. So that night, this night, at Brighton’s Factory, this night of radio and storms, this night of musical soliloquies, is one he cherishes because he has not backed away. The watches and the slumpers spur him on. As soon as he’s dispatched the mice and sheep, he’s taking further liberties, he’s giving Francine and two hundred others in the audience, plus any late-night listeners who’ve not switched off their radios, “Ding, Dong, Bell,” sending pussy down the well into musical deep space with a tumbling crescendo, followed by some risky trickery, not blowing on his saxophone at all but drumming with his fingers on the body and the keys close to the microphone so that it seems a lost and distant cat is scratching frantically at bricks.

However testing this might be, however intractable, no one there can say that Lennie Less does not love or does not suit his instrument, his perfect southpaw tenor, a costly Selmer paid for by Mister Sinister, his unexpectedly successful first collection. From the sardonic extra curve of the crook where the body meets the mouthpiece and the lips to the great flared bell that, depending on the slope and stoop of his back, can just as readily swing priapically between his legs as fit snugly against his abdomen or thigh, this saxophone has become a visceral appendix to the man. Flesh and brass seem unified. It is as if his fingertips and the flat tops of the keys are made from one material, as if breath and metal share substance and weight. So he is mesmerizing. Even for those who are impatient with his gimmickry or antagonized by his excesses or dislocated by his syncopation, there is plenty to wonder at and watch. This man who has come onstage in a dark suit with a shiny patch on the right trouser leg, at pocket level, where the bore and bell of his Selmer have worn the cloth, this man so evidently beset by nervousness that he at first can hardly lift his head to face the audience, this musician who has opened so carefully and timidly with “Three Blind Mice,” has started to transmogrify — there is no better word — before their eyes. It’s theater. You could be deaf and it would still be theater.

Leonard feels it too. He’s on the tightrope, balancing. It’s technique and abandonment. He is elated, yes, but he is also terrified. Usually when he is stepping in to improvise he can expect to play what he hears: all his daily practices, those hours spent running through arpeggios or exploring patterns, accents, sequences, and articulations in his song repertoire, provide him with a soundscape of tried and tested options; he merely has to choose and follow. He has exhaustively prepared in order to seem daringly unprepared. But here, tonight, he is not playing what he hears; he is hearing what he plays, hearing it for the first time, and only at the moment he — his lips — impart it to his reed. Each note is imminent with failure. But there is no retreat. Nor does he want to find a safer place, “a comfort groove,” as it is called. This is the moment he’s been waiting for, the moment when the wind picks up the kite and lets it soar. Some of the greatest improvisers claim, at rare times such as this, that when the music tumbles out unaided, as it were, it seems as if the notes are physical, fat shapes that dance, or colors pulsing, currents, swirls. For Leonard, because he always taps a foot, playing is more commonly like walking, corporal and muscular, walking tightropes, walking gangplanks, walking over coals, also walking on thin air, on ice, in darkness, on rock, on glass, but always walking blindfolded. Tonight, though, he is walking through a landscape forested in notes toward a clearing sky. The wind is at his back. The path ahead is widening. Statement, repetition, contrast, and return. Another sixteen bars and he’ll be there.

Recognize when you have done enough, he tells himself. Head home. He’s hardly moving now, no showboating. He doesn’t even tap his feet or rock his body. Apart from fingertips just lifting and the bulging of his throat, he is a statue voicing nursery rhymes, the final measure, ding dong bell.

The music’s ended for the moment — but this rare night in Brighton has an unrecorded track, an afternote, a human lollipop. Leonard has finished signing a handful of booklets and programs with a shaking hand, his autograph a mess. Euphoric and consumed, wanting more but not expecting anything except a hotel room, he heads out of the auditorium onto the snow and toward his taxi. A small group of intimate strangers in the mostly deserted lobby smile at him and shake his hand. They call out, “That was beautiful.” And “That was fun.” And “That was truly weird.” All men. All hardcore fans. Then, yes, then Francine speaks to him. She has delayed him at the taxi door. Her hand is on his arm. “Truly valiant,” she says, blowing smoke, still a little tipsy and not quite knowing why she’s chosen the word, a word that even now has resonance for both of them. Leonard sees a woman just a little younger but a good deal shorter than himself, large-featured in a girlish way, her hair unkempt, her red coat still damp from the storm and smelling slightly wintry. “Valiant?” he repeats. “Does that mean rash?” Rash as in reckless? Foolhardy? He hopes it does. “No, I mean valiant,” she says. “You know … valiant, taking risks. Yes, it was pure valiance.” Embarrassed by her loss of eloquence, her tipsy failure to summon the simple word valor when she needs it, she laughs. Such a pealing, mezzo laugh. The evening’s most melodic note, he thinks. And that becomes the start of it, his great romance.

NOW, WITH THE WORST of the country roads and the best of that day’s weather behind him and with fresh suburbs gathering, their snouts pressed up against the fields, Leonard listens to himself again, listens to the music of everybody’s childhood, spontaneously reshaped, listens to the retrieved mistakes that masquerade as wit and bravery, the risk-taking, the nerve, the valiance, almost unaware of traffic, the dimming sky, or the windscreen wipers, and certainly without much thought of Maxim Lermontov. He presses the track button and returns to the beginning of the broadcast. “In an unexpected adjustment …” And then again. And then again. Announcements and applause, with Francine in the audience — but that was then — admiring him.