Built the 6077 Forestmen set but had one light gray 1x2 brick remaining, I went through the manual several times but counted 33 bricks when bricklink has inventoried 34, is this an
Eldorado Fortress : Set 6276-1 | BrickLink
Set 6276-1 : Eldorado Fortress [Pirates] [BrickLink]
LEGO Pirates 6276 Eldorado Fortress and Fabuland 3681 Amusement Park - and a Haul - YouTube
I started with some mint condition Pirates Eldorado instructions, and stumbled upon a well-priced goldmine! (More info in captions & comments) : r/lego