In the introduction to Soul Catcher: Java’s Fiery Prince Mangkunegara I, 1726–95, MC Ricklefs notes that fifty years ago the prospect of writing such a biography of a pre-20th-century Javanese figure would have been unthinkable. That such a project is now possible is surely in no small part down to the remarkable work that Ricklefs himself has done in the intervening half-century, opening up a wealth of archival sources as one of the foremost international scholars of Javanese history.