See observations and questions in #189 here:
http://www.freerepublic.com/focus/chat/3407407/posts?page=189#189
And, who’s the next youngest kid to Mark in the pics of Marks book, pictures #11, #19/20 back row, #21, #22, #23 bottom, and #24 bottom, in this post?
http://www.freerepublic.com/focus/chat/3407407/posts?page=187#187
Not looking at #25 and the one at the top in #24; those have been hashed over a lot
Everyone is accounted for in the present day (David, up to the mid eighties )
http://www.freerepublic.com/focus/chat/3407407/posts?page=210#210
So, who’s that younger kid next to Mark in age?
And note that in all the pix of the book pix, Mark says “c” for “circa” and “around” such and such a date.
David was a fiction invented, as the freeper David noted above, to obscure Zero’s existence in those photos. Another boy had to be invented.
You’re overthinking it.
It was all made quite clear a few years ago.