"Now We Are Very Old" (2012) is a collection of Lockhart’s cautionary verses for the elderly, while "Now And Then, This And That" (2013) is a reflection on his family history, his experiences in the Second World War, the changes in education during his teaching career, and the changes in society during his lifetime. "British Bird Watching for Beginners & Enthusiasts" (2018), written for his grandchildren and illustrated with his own watercolours, explored his lifetime passion for ornithology. As a boy, he was taught to paint birds by Talbot Kelly.