Winifred Holtby met Jean McWilliam in a WAAC camp at Huchenneville in France very near the end of the First World War. McWilliam was the camp commander, and Holtby her new hostel forewoman. They took to each other instantly, became firm friends, and lifelong correspondents. Through a world overshadowed by war in both directions, they kept up a lively discussion of events, politics, literature and life, even when McWilliam relocated to South Africa in pursuit of her teaching career. Seeing each other very rarely in the flesh, their relationship was played out in the written word poignantly and...