Attached are 3 images.
1 - top of image 1 in the set
2 - bottom of image 1 in the set
3 - image 3 in the set
Looking at the side of the book/register this appears to me to be Document Type 'Index' - ie we can see the alphabetical tabs at the side.
I'm reviewing an image set at the moment where the keyer has laboriously keyed in all the information, so just want to check that I am correct in my interpretation.
If so - I will change the 'Document Type' to 'Index'.
What do you think?