Lewis took a large bunch of white seedless grapes (£2.50 a pound) from his carrier-bag. 'I thought – we thought, the missus and me – we thought you'd enjoy them, sir.'

He was gone; and Morse knew, within a second of his going, that he would not be forgiving himself easily for such monumental ingratitude. But the damage was done: nescit vox missa reverti.

The bell rang two minutes later, and Christine came across to Morse's bed as she left, and handed him six large photocopied sheets.

'I hope this is what you wanted.'

'I'm ever so grateful. It's – it's a pity we didn't have a chance to… '

'I understand. I do understand,' she said. 'And you will let me know if I can do anything else?'

'Look… perhaps if we-'

'Come along now, please!' The Charge Nurse's voice sounded to Morse almost as imperious as Nessie's as she walked quickly around the beds.

I’m so grateful,' said Morse. 'I really am! As I say it's… '

'Yes,' said Christine softly.

'Will you be in tomorrow?' asked Morse quickly.

‘No – not tomorrow. We've got some librarians coming from California-'

'Come along now, please?

Mrs Green, Sergeant Lewis, Christine Greenaway – now all of them gone; and already the medicine-trolley had been wheeled into the ward, and the nurses were starting out on yet another circuit of measurements and medicaments.

And Morse felt sick at heart.

It was at 9.20 p.m. that he finally settled back against his piled pillows to glance quickly through the photocopied material Christine had found for him. And soon he was deeply and happily engrossed – his temporary despondency departing on the instant.

The documents which Morse now handled were just the thing (he had little doubt) for satisfying the original-source-material philosophy which was just then swamping the GCSE and A-level syllabuses. And for Morse, whose School Certificate in History (Credit) had demanded little more than semi-familiarity with the earliest models of seed-drills and similar agricultural adjuncts of the late eighteenth century, the reading of them was fascinating. Particularly poignant, as it appeared to Morse, was the Foreword to the Insurance Guide and Hand-Book 1860 (bless the girl! – she'd even got the exact year) where the anonymous author stated his own determination to soldier along in 'this vale of tears’for as long as decently possible:

'Thus it is that all our efforts are forever required, not to surpass what we may call the biblical "par" for life – that famous "three-score years and ten" – but to come reasonably near to attaining it at all. For it is only by continuous vigilance and energy in the work for self preservation that the appointed average can be brought into view; and with good fortune and good sense (and God's grace) be achieved."

It was interesting to find the Almighty in parenthesis, even in 1860, and Morse felt he would like to have known the author. Yet when that same author went on to assert that 'mortality had decreased by two-fifths between 1720 and 1820', Morse began to wonder what earth such a bafflingly unscientific – indeed, quite sensational statement might mean. What did seem immediately clear, as he read through the small print, that people during those years were beginning to live longer, and that by the middle of the nineteenth century insurance companies were beginning to match this sociological phenomenon with increasingly attractive rates and premiums, in spite of the sombre statistics appended: each year, right up to the 1850s. Like 1853, e.g. – the figures for which Morse now considered. Of the half million or departed souls reported in the pages of the Guide, 55,000 had died of consumption, 25,000 of pneumonia, 500 of convulsions, 23,000 of bronchitis, 20,000 of premature death and debility, 19,000 of typhus, 16,000 scarlatina, 15,000 of diarrhoea, 14,000 of heart disease, 12,000 of whooping cough, 11,000 of dropsy, 9,000 of apoplexy, 8,500 of paralysis, 6,000 of asthma, 5,750 of cancer, 4,000 of teeth troubles, 3,750 of measles, 3,500 of croup, 3,250 of small-pox, 3,000 of (mothers) giving birth; and so on to the smaller numbers succumbing to diseases of brain, kidney, liver, and other perishable parts of the anatomy – and to old age! As he added up such numbers quickly in his head, Morse realized that about two-thirds of the 500,000 were unaccounted for; and he had to assume that even with a few more categories added (‘murder' for one!) there must have been vast numbers of people in those days whose deaths were for some reason or other not specifically 'accounted for' at all, albeit being registered in the national statistics. Perhaps a lot of them were just not important enough to get their own particular malady spelled out on any death certificate; perhaps many of the physicians, midwives, nurses, poor-law-attendants, or whatever, just didn't know, or didn't want to know, or didn't care.

As he lay back in the pillows and thought of the circumstances besetting the luckless Joanna Franks, who had died neither of consumption nor pneumonia… nor… he suddenly fell into a sleep so deep that he missed his 10 p.m. Horlicks and his treasured digestive biscuit; and then he woke up again, somewhat less than refreshed, at 11.45 p.m., with a dry throat and a clear head. The lights hi the ward were turned down to half power, and the other patients around him seemed contentedly asleep – apart from the man who'd been admitted late that afternoon and around whom the medical staff had been fussing with a rather ominous concern; the man who now lay staring at the ceiling, doubtless contemplating the imminent collapse of his earthly fortunes.

Nessie was nowhere to be seen: the desk was empty.

He'd just had a nasty little dream. He'd been playing cricket in his early days at Grammar School; and when it came to his turn to bat, he couldn't find his boots… and then when he did find them the laces kept snapping; and he was verging on a tearful despair – when he'd awoken. It might have been Mrs Green talking about her chiropody? Or was it Lewis, perhaps, who'd brought the card from the cobblers? Or neither of them? Was it not more likely to have been a young woman in 1859 who'd shouted, with her particular brand of terrified despair, 'What have you done with my shoes?'

He looked around again: the desk was still empty.

Surely he wasn't likely to imperil the well-being of the ward if he turned on his angle-lamp? Especially if focused directly into a small pool of light on his own pillows? No! Reading a book wasn't going to hurt anyone and the sick man had had his light on all the time.

Pushing in the button switch, he turned on his own light, with no reaction from anyone; and still no sign of Nessie.

Part Three of Murder on the Oxford Canal was close to hand; but Morse was reluctant to finish that too quickly. He remembered when he'd first read Bleak House (still to his mind the greatest novel in the English language) he'd deliberately decelerated his reading as the final pages grew thinner beneath his fingers. Never had he wanted to hang on to a story so much! Not that the Colonel's work was anything to wax all that lyrical about; and yet Morse did want to eke it out – or so he told himself. Which left the not displeasing possibility of a few further chapters of The Blue Ticket – with Mr Greenaway now fast asleep. The pattern of crime in nineteenth-century Shropshire had already joined the local legion of lost causes.