Source citation is important. On the basis if what has been written so far in this thread alone, I think there is a real danger of
'compound fractures' in source material..
The fact that Hall cites Sapherson and Grant (are we talking here about Charles S Grant?) is a little bit of a concern. I have the greatest respect for the former and am a personal friend of the latter but CSG will tell you straight that when he wrote
From Pike to Shot his source material was very thin on the ground and caused no end of frustration and problems. Sapherson uses Tilroy(a contemporary source) and Belaubre (a modern source) for much of his material. Research of the very detailed and painstaking nature required to verify old and obscure data which is not in 'modern' format is rewarding (possibly not financially) but extremely labour intense. The citing of such sources would not give me confidence because much, most, all, is secondary, tertiary or even further removed.
The discussion on colour interpretation with input from Arthur, Conflans and others is VERY necessary, enlightening and insightful. Wargamers have, in their curious way a habit of quoting from books as if THEY themselves found out the information. I have had this inflicted on me several times. It is not pleasant, chiefly due to the delivery style. There are many sources which should be cross referenced and their provenance scrutinized thoroughly before conclusions are drawn.
I will give two brief examples of inadverent hares which I myself have set running without any intent.
1. The mischief of painting the pikes on a Landsknecht unit in alternate red and yellow horizontal bands because I was bored with the models and wanted to jazz up the unit which I did not like - This prompted one casual observer to visit another Italian Wars demo at the same show and tell the hapless exhibitors that their pikes were WRONG because pikes had coloured bands
2. My desire to give an Irish Jacobite unit a Catholic style flag for want of any available information. I painted a large heart wrapped in thorns with the motto Jesus Sacre Cour. I had two emails from serious research students asking if I could provide my source as they wanted to include reference to it in their current works
I mean.............
So, questions about the sources for Hall are extremely relevant. If it is only Hall's interpretation of Mark Allen's interpretation of Sapherson's, Grant's or Ede Borrette's interpretations then the answer is a definite maybe it's accurate.. no disrespect to any of the above gentleman all of whom contribute immensely to our hobby.
If Sapherson is the sole source of the ECW style standard for Kirke's that would not be enough for me.