Passage: Following its capture, Java was under British administration from 1811 to 1816. The appointed governor was Lieutenant Governor-General Thomas Stamford Raffles, who took great interest in the history of Java. He collected Javanese antiques and made notes through contacts with local inhabitants during his tour throughout the island. On an inspection tour to Semarang in 1814, he was informed about a big monument deep in a jungle near the village of Bumisegoro. He was not able to see the site himself, but sent Hermann Cornelius, a Dutch engineer who, among other antiquity explorations had uncovered the Sewu complex in 1806–07, to investigate.

Question: What did Thomas collect?
Javanese antiques