Hard to think of the Normans as being ‘night-capped’ as in my English mind, they are more a memory of conquering invaders. But here it seems to be they who are surprised by a marauder.
‘After startling the solitary Magyar herdsman with the untimely uproar and alarming the night-capped Normans with thoughts of theft…’
Source: Patrick Leigh Fermor, Mani: Travels in the Southern Peloponnese, introduction by Michael Gorra, New York: New York Review of Books, 2006 (1958), p. 145