One thing worthy of note here,is that there is no locally available stone,other than flint,for wall building,so all of the dress stone had to be brought some distance.Quite an achievement in those days.
see http://en.wikipedia.org/wiki/Hadleigh_Castle
see http://www.castlexplorer.co.uk/england/hadleigh/hadleigh.php
see http://castlefacts.info/castledetails/castleDetails3.aspx?uin=11135