« Reply #32 on: Thursday 07 January 10 22:47 GMT (UK) »
Well, not my formula either, but that of the researchers. It was based on extensive surveys in several western countries on the question of acceptable age difference. Remarkably, there was little national or regional variation, the formula held true averywhere.
NSW Convict 1836: Peter WIFFIN (alias VIVIAN)
VDL Convict 1841: Richard REES
SA Pioneers (<1847): Hornsby, Wallis, Willoughby, Floate, Mills, Chesson, Degenhardt.
SA Old Colonists (<1857): Messenger, Tyler, McFeat, Ladner, Edwards, Cassidy, Rhodes, Shaw, Waye, Sibly.
SA Colonists (<1901): Jones, Pike, Bowyer, Davey.