re: #199 IslandLibertarian

For example, “gleaming” is a gerund, a noun ending in -ing, not a verb because it’s the object of the preposition “at.”

ok, not trying to correct you.my grammar skills are not very good, but isn’t the object of the preposition “at” the word “twilights”?

No. The line is

“…at the twilight’s last gleaming?”

“twilight’s” is a possessive noun, which functions as an adjective, modifying “gleaming.”
“last” is also an adjective, modifying “gleaming.”
“gleaming” is the object of the preposition “at” because it answers the question what?
At what?
At the twilight’s last gleaming.