This novel is set on the Polish Front during the First World War, and follows an Englishman working for the Red Cross on the Russian side. An enthusiastic observer of human nature, he is profusely empathetic and analytical, and becomes enthralled by the complex relationships of his fellow medics. The chapters of this book are: Spring in the Train, The School-House, The Invisible Battle, Nikitin, First Move to the Enemy, The Retreat, One Night, The Lovers, Marie Ivanova, The Forest, Four?, and The Door Closes Behind Them. Sir Hugh Seymour Walpole (1884 - 1941) was English novelist who was born in New Zealand. This volume is being republished now in an affordable, modern edition complete with a specially commissioned new biography of the author.