Twitten is an old dialect word, used in both East and West Sussex, for a path or alleyway, which is still in common use. The word is also in common use in the London residential area known as Hampstead Garden Suburb.Elsewhere in the country, such alleyways are termed chares (north-east England), opes (Plymouth), jiggers (Liverpool) and snickelways (York).

Source: Wikipedia.

so with our swaggering gutter beaux clearing the way for us, we pressed deeper into that tangle of twitterns which formed the knotted core of the rookery.

Source: Von Bek, ‘The City in the Autumn Stars’, Michael Moorcock.