Thanks to the funding made available via my Patreon campaign, these recently arrived:
Document: “A Recoverable Air-Breathing Booster,” 1964, Chrysler Space Division. This report describes a ring to be fitted to the base of a Saturn I booster; the ring is equipped with either 4 or 8 additional H-1 rocket engines for additional liftoff thrust, as well as a similar number of turbojets to be used to return the ring-booster to Cape Canaveral for a vertical landing.
Diagrams: “Plans for Scale Model Construction of the LONG TANK DELTA” and “Plans for Scale Model Construction of the LONG-TANK THOR AGENA,” from McDonnell-Douglas, 1971. These came in an envelope, and illustration on which depicts the Delta rocket, the Honest John (the diagram of which I have previously obtained), the Saturn I, the Genie AAM, the Nike Ajax and the Nike Hercules. If anyone knows of the latter 4, please enlighten me.
These will be added to the list of drawings/documents available to my Patreon patrons to vote on.