Which books did Sir Richard Burton write about India after returning to Europe?

After returning to Europe from his service in India, Sir Richard Burton lived in Boulogne, France, where he wrote four books concerning his experiences and observations in the region.1

The most notable of these works is Sindh, and the Races That Inhabit the Valley of the Indus (1851), which is recognized as a brilliant ethnological study. While Burton later wrote other works throughout his career—including a nostalgic volume on the Sindh during his time in Trieste—the four books produced during his initial return to Europe remain the primary collection written specifically about his time in India.12