sentences:  At the age of seven, he developed a tuberculosis illness in his legs, and he became exceptionally thin and missed large amounts of schooling.He became the first local apprentice at St Ives' Leach Pottery at the age of 14, picked by Bernard Leach's son David due to his enthusiasm and despite his physical weakness.While he was initially registered as an "essential worker", Marshall was conscripted for World War II in 1942 and joined the Royal Artillery.