Read it through once

One fine day Tess and ’Liza-Lu worked on here with their neighbours till the last rays of the sun smote flat upon the white pegs that divided the plots. As soon as twilight succeeded to sunset the flare of the couch-grass and cabbage-stalk fires began to light up the allotments fitfully, their outlines appearing and disappearing under the dense smoke as wafted by the wind. When a fire glowed, banks of smoke, blown level along the ground, would themselves become illuminated to an opaque lustre, screening the workpeople from one another; and the meaning of the “pillar of a cloud”, which was a wall by day and a light by night, could be understood.