Before reading this article I could not quite pin point what the ANZAC legend was or how explain it on paper.This website gave me a thorough explanation of the ANZAC legend and how it formed. It is a very valuable source.
Reading the section 'Was there a late change of plan?' helped me to decribe the debate between historians of whether there was a navigational error or just a change of plan that resulted in the ANZACS arriving on ANZAC Cove.