on a later read-back:
It is of course impossible to say precisely when this was. Norman Penney¹ seems to suggest that it was for the 1694 publication, though his note is ambiguous: ‘ The numerous MS.corrections in Lower's handwriting show the care and interest with which he revised the MSS. of The Journal’. If he is suggesting that the alterations in Spence were for the printed edition, this does not compute: (a) a brief glance at our comparative parallel texts shows that they were not adopted, and (b) the kind of alterations, often lengthy and always vigorous, suggest second thoughts and amplifications by Fox himself.
All that can be said in our section is that Lower's writing in this second layer is more formal and done with a finer pen, which suggests more leisure and possibly more comfortable circumstances. But it would be difficult to argue that the first lot were necessarily made in Worcester Jail and the second at Swarthmoor.
A forensic examination of the two layers of ink would be possible, but their chemical composition is likely to be too close to lead to useful conclusions.

1.    The Journal of George Fox in Two Volumes: Volume One edited Norman Penney (Cambridge University Press, 1911) xiv.