Hei Ho, challenged the Mustika near Kasoe Island and Samboe Island. (The Japanese had increased surveillance of the area since Operation Jaywick.) It is unclear why the patrol boat approached the Mustika – various theories offered included: the ship flew the wrong flag; it was a suspicious size; the sailors were identified as white men, and not Malays. Shots were fired between the vessels – it was later deduced one of the Australian commandos aboard panicked and started firing at the approaching patrol boat. Some of the patrol boat crew were killed but at least one escaped and managed to get back to report the incident. Lyon knew the patrol boat would seek help from Japanese occupation authorities and decided to abort the mission. He scuttled the junk and the Sleeping Beauties (which were top secret weapons at the time) with explosive charges. He then ordered his men to divide into four groups and make their way back to Merapas by use of the folboats that they had stored on Mustika. The groups were led by Lyon, Davidson, Page and Ross. Attack on Singapore Harbour Three of the groups headed to Merapas immediately. Lyon led his group into Singapore Harbour. It consisted of himself and a small force of six other men — Lieutenant Commander Donald "Davo" Davidson, Lieutenant Bobby Ross, Able Seaman Andrew "Happy" Huston, Corporal Clair Stewart, Corporal Archie Campbell and Private Douglas Warne. They are believed to have sunk three ships with limpet mines, although evidence confirming this is limited. The Singapore Garrison of the Imperial Japanese Army did unleash a punitive force of at least 100 soldiers led by Major Hajime Fujita including army, navy and native police to find the commandoes. Initial flight It is probable that some of the folboat parties stopped on the headland of north-western Batam and left. Batam had been used during ‘Jaywick’ as a hiding place by Davidson in 1943. On 14 October 1944 some commandos were reported as being on Pankgil Island (thought now to most likely be Page's group). Japanese soldiers were sent to the island but did not find them. Battle of Soreh Island On 15 October, five of the men (Lyon, Davidson, Ross, Stewart and Campbell) were on Soreah Island, or Pulau Asore, a small island just off Pulau Mapur, near Pankgil Island. A Japanese patrol caught up with them and arrived at the island at