Passage: Bad weather allowed the Allied expeditionary force to arrive in the vicinity of Guadalcanal unseen by the Japanese on the morning of 7 August. The Japanese detected the radio traffic from the incoming Allied invasion force and prepared to send scout aircraft aloft at daybreak. The landing force ships split into two groups, with one group assigned for the assault on Guadalcanal and the other tasked with the assault on Tulagi, Florida, and Gavutu–Tanambogo. Aircraft from the aircraft carrier USS Wasp dive-bombed Japanese installations on Tulagi, Gavutu, Tanambogo, and Florida and strafed and destroyed 15 Japanese seaplanes floating in the anchorages near the islands. Several of the seaplanes were warming their engines in preparation for takeoff and were lost with their aircrews and many of their support personnel.The cruiser USS San Juan and destroyers USS Monssen (DD-436) and Buchanan bombarded planned landing sites on Tulagi and Florida Island. To cover the assaults on Tulagi, Gavutu, and Tanambogo, U.S. Marines from the 1st Battalion, 2nd Marine Regiment made an unopposed landing on Florida Island at 07:40. They were guided to their objective by several Australians, such as Lieutenant Frank Stackpool (later Captain, British Solomon Islands Protectorate Defence Force), who were familiar with the Tulagi-Florida area from having previously lived and worked in the area.

Question: How was Stackpool knowledgeable about the Tulagi-Florida region?
previously lived and worked in the area