would let him sing a little alleluia in the porch.'
I had now got the protective canvas off, and the beautifully worked leather binding gleamed golden in the light of the lantern.
I opened the cover. Inside, the text was written in purple ink on the finest vellum - strong, supple and waxy, but so thin as to be virtually translucent. The calligraphy was a beautifully clear and cursive form of early medieval Georgian. According to the library's detailed catalogue, the volume had bound together a number of different early Byzantine devotional texts. The first folio I opened was apparently a shrill sermon by St Jerome, denouncing what he considered the thoroughly pagan practice of taking baths: 'He who has bathed in Christ,' fumed the saint, 'does not need a second bath.'
Only towards the end, on folio 287 verso, did I come to the opening lines of the text I had come so far to see. Its author was the great Byzantine traveller-monk John Moschos, and the book had been compiled at the end of his life as he prepared for death in a monastery in Constantinople, 1,300 years ago.
'In my opinion, the meadows in Spring present a particularly delightful prospect,' he wrote. 'One part of this meadow blushes with roses; in other places lilies predominate; in another violets blaze out, resembling the Imperial purple. Think of this present work in the same way, Sophronius, my sacred and faithful child. For from among the holy men, monks and hermits of the Empire, I have plucked the finest flowers of the unmown meadow and worked them into a crown which I now offer to you, most faithful child; and through you to the world at large
Turning up the lamp, I opened a fresh page.
In the spring of the year 578 a . d ., had you been sitting on a bluff of rock overlooking Bethlehem, you might have been able to see two figures setting off, staves in hand, from the gates of the great desert monastery of St Theodosius. The two - an old grey-bearded monk accompanied by an upright, perhaps slightly stern, and certainly much younger companion - would have headed off south-west through the wastes of Judaea, towards the fabulously rich port-metropolis of Alexandria.
It was the start of an extraordinary journey that would take John Moschos and his pupil, Sophronius the Sophist, in an arc across the entire Eastern Byzantine world. Their aim was to collect the wisdom of the desert fathers, the sages and mystics of the Byzantine East, before their fragile world - already clearly in advanced decay - finally shattered and disappeared. The result was the volume in front of me now. If today in the West it is a fairly obscure text, a thousand years ago it was renowned as one of the most popular books in all the great literature of Byzantium.
Byzantine caravanserais were rough places, and the provincial Greek aristocracy did not enjoy entertaining: as the Byzantine writer Cecaumenus put it, 'Houseparties are a mistake, for guests merely criticise your housekeeping and attempt to seduce your wife.' So everywhere they went, the two travellers stayed in monasteries, caves and remote hermitages, dining frugally with the monks and ascetics. In each place, Moschos seems to have jotted down accounts that he had heard of the sayings of the fathers, and other anecdotes and miracle stories.
Moschos was taking to an extreme the old Orthodox tradition of the wandering monk. In the West, at least since St Benedict introduced the vow of stability in the early sixth century, monks have tended to be static, immured in their cells: as the saying went, 'A monk out of his cell is like a fish out of water.' But in the Eastern Churches, as in Hinduism and Buddhism, there has always been a tradition of monks being able to wander from guru to guru, from spiritual father to spiritual father, garnering the wisdom and advice of each, just as the Indian sadhus still do. Even today, modern Greek Orthodox monks take no vow of stability. If after a period of time in a monastery they decide they