All dialog shown onscreen in the mockup is original, taken from Lost Coast's closedcaptions_english.txt file. All of this leftover geometry was left unchanged for the mockup. The original spawnpoint in the map is also on a dock at the start of that path, all seemingly leftovers from the boat ride version.
One of the early iterations of Lost Coast (d2_LostCoast_scene.vmf, dated February 2005) contains a very highly detailed path on the other side of the level from where the player actually goes in that version. According to Valve's Robin Walker, one of the early versions of the Lost Coast had the Fisherman picking the player up in a boat and bringing them to the Monastery. 1 rough mockup of the earliest known iteration of Lost Coast, in which the player rides in a boat with the Fisherman into the bay. 6 maps created during the development of Lost Coast by Valve. This addon for Half-Life 2: Lost Coast includes: