This book was written in English by my mother and translated into Welsh. It was never published in English. If I remember rightly, the story is about the struggle of the militants who wanted to reject English rule of Wales, sometimes known as the Free Wales Army, who were active in the early 1970s including burning holiday cottages and planning bombs at the investiture of the Prince of Wales at Caernarfon and other big state occasions. Tros yr Afon, literally across the river refers to the River Severn, the natural border between south Wales and south western England which is where my mother's family came from.