Last spring, I visited the hamlet of Knill, deep in the Herefordshire countryside. Knill lies on the river Lug, a tributary of the Wye, and in the 1930s Penelope Fitzgerald’s father, Eddie Knox, used to come here and fish with his brothers, taking the lease on a cottage. I had learned this from The Knox Brothers (1977), Fitzgerald’s beguiling biography of four remarkable men; loving it as much as her novels, I was keen to find this cottage, of which she had happy childhood memories.