Thank you Bobcat,
I used that site to create for myself a searchable PDF.
It brings up another thought: given the way in which, at ch 21:31, the John Gospel returns to its opening, I wonder if it would be possible to create a multi-level chiastic analysis of the whole Gospel. Not right now for me, unless someone has done it already. I'll have a look at the commentary on by Leon Morris that I have, but I seriously doubt it. Neither do I think that Spong looks at the chiasms in his consideration of the Gospel. I will have to look some other time.
Doug