I would explain that most of the documents weren't online. In the case of Casting the Net helpful colleagues would point me at sites where RFCs were posted. In Matrix News vol. So far as I can tell, we are. Let me use the early RFCs as examples.
None is online.
Nor are 11 between 400 and 420. Nor any between 500 and 525. But both Dave and Alex have since retired. And the volunteer project moves very slowly. The online presences of the ISI or the IETF or the John von Neumann Center are relatively paltry.