belfry
a church steeple or tower in which bells are hung
stealthy
moving in a quiet and sneaky way
tread
footsteps
moorings
the ropes and cables holding a ship to a dock
aloft
high up
grenadiers
soldiers
barrack
a place where soldiers are lodged
sombre
deep, mournful
sentinel
a soldier who guards a gate or a door
alders
any of a genus (Alnus) of toothed-leaved trees or shrubs of the birch family that have catkins which become woody, that typically grow in cool moist ground, and that have wood used especially in turnery (m-w.com)
spurred
a horse whose rider is wearing spurs to make it go faster
impetuous
doing something quickly and without much forethought
spectral
ghostly
fleet
very fast
gilded
covered with a thin layer of gold
aghast
shocked and horrified