"Gravimetrical-Geological Map of the East Indian Archipelago" by Vening
Meinesz, et al. In: Gravity Expeditions at Sea 1923-1932. 1935 Vol II. Plate
IV. This map is possibly the first to hint at the correlation between gravity
and bathymetry as the Java Trench is mirrored by the red and pink negative
gravity anomaly south of the island of Java.