PROBABLY this is because this cave does not have a unqiue wallet, but shares a wallet with other caves. We do not have the multiple-caves-per-wallet thing working fully yet. Look through the wallets per year instead, and do a text seearch on each page for the cave name.
Before 1998 we used a survey book system, not wallets. But 1983 has some scraps recreated as wallets.
That is probably why you cannot see anything here. Look at the complete list of scanned files instead, at Scans (it is slow, so be patient). It lists things like "1984AndysNotebook" instead of a wallet identifier, but if you click on "1984AndysNotebook" you will see some of the the notes and sketches scanned from it.
Or look at all the scanned files, their wallet names and the drawings that were created using them at Drawings which is probably more useful. {% endfor %}