Click on the boat.
The map you found has some cryptic clues. The first tells you to sail in the only possible ordinal direction (NE,SE,SW,NW).
One more space in the same direction...
Now, make a 45° turn to the left and go four spaces (click the next four spaces).
Keep going...
And going...
You spot some land to the north...
But, the next clue says to set sail again. This time, in the direction of the rising sun, one more space than you just traveled north.
This seems to be the right direction...
So, you keep sailing...
And sailing...
Passing land to the right...
...and some land to the left. The instructions now just say to make a 90° turn and sail three spaces.
This looks right. Had we turned to the left, we would have already hit land. Keep going...
Passing a fairly large island to the right...
Now, you need to make another 90° turn and speed through three grid squares.
Two more...
One more...
We're out at sea now, but the next path should bring us closer to land. We're told to turn 45° toward the closest land mass and move two spaces.
One more to go...
Now, the map tells us to turn 45° again, in the same direction as the last time.
Yup, this looks right. Two more spaces in this direction.
One more... Look at the pretty dolphins...
And, another 45° turn, again in the same direction as last time.
Due north, one more space...
Now, head NE one space, and then N two more spaces.
Keep going...
Land ho!
You've docked at the cove here. Now, travel on land N to the corner of the map.
Climb up the mountain looming in front of you.
You enter a cave and notice an alcove carved into the hewn wall. You reach in, and find... another map?! Back in the ship, sail due west two spaces.
Keep going...
Now, you need to get to a point four spaces due W. But, there's a reef in the way. Make a detour by traveling diagonally two spaces in one direction.
Phew, that was a close call. At least the reef looks pretty. One more space in this direction.
Now, back down diagonally two more spaces.
I'm getting hungry.
Now, head SW to land.
Oh, we were already heading that way. Well, keep going.
We're approaching another island. Are we there yet?
Turn and sail one more space to the dock on the northern coast.
Finally, on land again. Head south.
Same direction again.
Now, turn and head to the SW corner of the island. I can see some caves from here.
In the far end of the cave, you find a chest. Inside, there are five rusted keys... Back in the boat--and frustrated--you head NW for the closest inn.
On looking at the map again, you realize it's double-sided! Luckily we're still on the right course. Continue on.
On nearing land, though, cannon balls are fired at your ship! Quick, make a 90° turn towards the other side of the bay to escape.
We're out of range, now. Turn back to our previous direction of travel.
And, a slight turn to sail into the cove.
Set foot on land again, this time into the setting sun.
Now, to get back on course, turn 90° and walk two spaces.
There's another mountain in the distance. Keep trudging on.
And, one more 45° turn away from the coast, towards what looks like another cave.