If you do a Google search for 1797-1 Imperial Cannon instructions you can see
that an instruction booklet does exist, but if you do a Bricklink search you
cannot bring up a separate entry for the instruction booklet. Why not? I do
not know how to build an entry for this on Bricklink.
[...] You must mean (Set 1795-1) That set is part of (Set 1723-1) And that set does have instructions. (Instructions for Set 1723-1) David (17 months ago, Dec 28, 2022, to Catalog)