Just read this for the first time. To me it appears curiously disconnected in its flow and adds nothing (for me at least) to any of the biographies which I have previously read.
One strange thing thing I noted is that when describing Jack's first visit to England to attend boarding school, he says that they sailed into Liverpool and then (as per Surprised by Joy) had him travelling by train from Fleetwood to London! Clearly if he had landed in Liverpool he would have caught the train from Liverpool, not Fleetwood which is quite a lot further north. I have always assumed that the Irish ferry landed at Fleetwood Docks.
Bill