Getting your excuse in early are we? Why did you bother asking for clarification if you were never going to accept the reply? It’s only hearsay in your chip on the shoulder world. CAL referenced the source and acknowledged his personal contribution, that’s how books work! How do you know that anything in history happened? You only have someone else’s word for it! Then again in your world everything was and is fake news unless you experience it for yourself! You won’t accept any response from the publisher UNLESS it agrees with your interpretation - then of course, it won’t be hearsay! 
Getting your excuse in early are we?
No just making clear exactly what it is that is being clarified.
Why did you bother asking for clarification if you were never going to accept the reply?
I have made clear that I will post the reply, verbatim, as I have the request. You were unwilling to do so until your hand was forced. However, as I have also made clear, your reputation of selectively quoting in order to dissemble is well known to any reader of this forum. Your interpretation of letter exchanges is, to say the least, dubious. This is why a verbatim exchange has been offered by me to preempt unsupported claims being made by you using partial quotes. You are that predictable.
It's only hearsay in your chip on the shoulder world. CAL referenced the source and acknowledged his personal contribution, that's how books work! How do you know that anything in history happened? You only have someone else's word for it! Then again in your world everything is fake news unless you experience it for yourself!
It is hearsay in anyone's world whether with chips or not. The rest of that is quite mad and irrelevant.
You won't accept accept any response from the publisher UNLESS it agrees with your interpretation - then of course, it won't be hearsay!
It will still be hearsay, self evidently. You admit it yourself when you ask,
Perhaps NGB can clarify whether the interview with David Bird (given that it can be verified by him) is indeed 'hearsay'
The bit that you placed in brackets is important. By inference you are admitting that until verified by Bird it is hearsay. You are not asking Bird to verify it? Therefore it is still hearsay.
Perhaps now you could answer why you claimed that I invented the second part of the sentence "while he was engaged on the lab treatment"? It is included in your letter to the publishers so you agree that I didn't invent it. Is it perhaps because you made a mistake due to your inadequate comprehension skills? Writing opinions on something before you have read and properly digested the meaning is a demonstration of your poor comprehension.
Whatever your answer or non answer to this is, it is a perfect example of why your interpretations are considered worthless by anyone with sense.
For what it's worth I will give you an explanation why your interpretation is incorrect. The confusion you have is around the use of the word "can". In this instance the word can is used as a modal verb(google it) to show possibility. It does not mean "to be able to". Modal verbs are part of key stage 2 English (between 7 and 11 years). You are showing less understanding of English than a reasonably intelligent 11 year old.