The Morse messages do go into the rock. Or rather, under the surface. Like a hidden palimpsest text. It is nice to connect the themes. I hope the solutions are somewhat more concrete.
Its been awfully quiet in here for a while.
I've been toying with the palimpsest problem for a little while, and started to wonder about a connection to the Morse code sheets.
The Morse codes don't complete words, but rather portions of words. What if this is our palimpsest? An item used in the sculpture as something else.
The easiest section is K3. I think most would agree. It sets the first piece of the puzzle. The opening of an ancient door. The plaintext reveals a short phrase, separate from the rest, bound by an X and Q, CAN YOU SEE ANYTHING. I believe this indicates a visual theme is to be utilized.
The ciphertext has the offset string DYAHR. It isn't so easy but I think hints at each of the keywords indirectly. K2 contains LAYER TWO. I might assume (correctly or incorrectly) that implies K1 is to be LAYER ONE.
I'm continuously updating my process on this puzzle. I keep thinking K3 is solved first, followed by K2 and then K1. I lean strongly towards the idea that the keywords PALIMPSEST and ABSCISSA are not intended to be discovered prior to solve. Only the intended receiver for the "secret message" should know those. I don't know who that receiver should be, but to me it's the role of the CIA and/or us as the role of cyrptographers to discover the answers the hard way. This puts into perspective the idea that the keywords themselves are intended as clues in addition to their standard function in the crytogram.
I think the word abscissa suggests something relating primarily to horizon, longitude, or width. It relates to position of a coordinate and a quantification or measurement with respect to an origin. If this is the correct assumption, then I would turn to the sculpture and it's text as something that is intended in someway to provide us with numerical data that is interpreted in terms of width. Clearly there's some trend in the width of the code where it varies from 30-32 width on each pannel. What is the width of the solved text of K3? Is it arbitrary or is it intended to be 42?