The National Gallery, London possesses an important collection of paintings by 16th-century Netherlandish artists, including Joachim Beuckelaer, Hieronymus Bosch, Pieter Bruegel the Elder, Jean Gossart, and Quinten Massys. They are grouped here with a small number of French paintings, some by artists who came from the Low Countries (Corneille de Lyon, probably Jean Hey, and perhaps the Master of Saint Giles). Lorne Campbell's catalogue is...