Thanks for posting these excellent documents. I was able to download the
following fine:

Mercury Familiarization Manual May 1962 (3 orbit version)
Gemini Manual Vol 1 (Long Range and Modified)
Gemini Manual Vol 1 Supplement (Long Range and Modified)
Gemini Manual Vol 2 Supplement (Rendezvous and Docking)

This file only downloads 90-95%, then locks up with a I/O timeout error:
Gemini Manual Vol 2 (Rendezvous and Docking)

These 2 I also am having trouble with:
Mercury Maintenance Manual 1959
Mercury Tracking Sites

Thanks,
Rich Haley