Plaque at the Jackadder Lake in Woodlands, Western Australia. It reads, "The dairy industry in the Osborne Park/Woodlands area was important to the development of the City and produced the majority of Perth's milk supply in the early 1900s. The cows of the Manning, Bruce, and Bradley dairies grazed on land around Jackadder Lake. Other dairymen in the area were Robinson, Flynn, Connolly and Butler."