[shove_it]

Here's the before picture ...

I thought the bow was visible but after re-reading the article, that is the stern - you are correct.

[TXnMA]

Yes, it is the stern that is visible. The photos on the website show what appears to be the lower half of a lignum vitae "packing gland" for the propeller shaft at the exposed end.

FWIW, those (~2' thick?) hull walls have a surprisingly complex structure. IMHO, it would be worthwhile to excavate a buried (and intact) section, measure and document it thoroughly, and have a marine architect do a computer reconstruction of that hull wall structure. From that, with adequate measurements of the overall hull remains, a computer (CAD) reconstruction of the hull would be doable.