The White Ladies of Worcester (Historical Novel). Florence L. Barclay

"The White Ladies of Worcester" is an inspiring romantic story of a nun who enters a convent thinking her lover is dead and a knight who was told his lady had married another. As the nuns in the Nunnery of the White Ladies return from Vespers through the underground passage into the cloisters, an old lay-sister Mary Antony counts them every time by dropping one pea for each nun from her hand into a bag. However, one evening her count turns out differently – the nuns pass, all the peas drop into the bag, and then one more nun passes by, making the old lady think that there might be an intruder into the convent…