I can certainly add it, but as the discussion above was essentially about weasel words, I would suggest some slight modification. First of all in his paper Early Anglo Saxons, Welch argues why  Ælle could not have landed in the Selsey area, but in his AS England p. 9 he says that the AS Chronicle was a product of the West Saxon court and is concerned with  glorifying the royal ancestry of Alfred the Great. Manipulation of royal geneologies , in this and other sources, to enhance the claims of present rulers was common. Literary formulas associated with original myths are a common feature of earlier entries. When Aella and his three sons land from three ships on  a beach named after one of the sons, we are reading legend rather then real history. 
 ::::::::::::I think that most historians are lukewarm on Ælle,  it is the detail of his existence rather than whether he was a real person. So I would suggest the following, obviously with the appropriate citations:  
 ::::::::::::In the Introduction: 
 ::::::::::::*Delete: The information about him is so limited that it cannot be said with certainty that Ælle existed.   
 ::::::::::::*Change: Ælle and three of his sons are reported to have arrived from the continent near what is now Selsey Bill—the exact location is under the sea, and is probably the shoals currently known as the Owers—and fought against the Britons.  
 :::::::::::::To: According to the Anglo Saxon Chronicle Ælle and three of his sons are said to have landed at a place called Cymensora and fought against the Britons. 
 ::::::::::::*Delete:  Although the details of these traditions cannot be verified, evidence from the place names of Sussex does make it clear that it was an area with extensive and early settlement by the Saxons, supporting the idea that this was one of their early conquests. 
 ::::::::::::*Change: Ælle's death is not recorded, and it is not known who succeeded him as king of the South Saxons. 
 :::::::::::::To: Ælle death is not recorded, and although he may have been the founder of a South Saxon dynasty, there is no firm evidence linking him with later South Saxon rulers 
 ::::::::::::The beginning of Historical context section: 
 ::::::::::::*Change: Ælle, if he existed, lived in the middle of the least-documented period in English history of the last two millennia. 
 :::::::::::::To: Historians are divided on the detail of Ælle's life and existance as it was during the least-documented period in English history of the last two millennia. 
 ::::::::::::: Comments??