Check in with George. She wants to go with you to the final cave, but this must not happen. Have Nancy start an argument so she can go alone. Return to Sangre Beach and talk to Rolle. Give him the map to Cibala, City of Gold. Something happens shortly afterwards and Nancy gets thrown into the cave where the kidnappers hid her friend Bess.
Neither you nor Bess likely intends to stay in the cave. Bess needs food and water. You can find your way out and find the treasure of El Toro as you reach the exit. Examine the wall of the cave you were thrown into. There is a keyhole on the door. Use the key you got from the hourglass puzzle on the lock. A door opens and you find the final resting place of El Toro.
Click on the skeleton and take a skeleton key from it. Click on the bull and a picture behind El Tor reveals a chest. Click on the picture and the game will show you a symbol puzzle.
You should expect disappointment here. A Spaniard loyal to the Spanish crown would not let pirates get his treasure so easily. You must open one more lock to find El Toro's treasure.
Insert the hour glass and El Toey's skeleton key into the holes ont he box. Turn the keys and see how the buttons are affected. Press I, II, IV, and V. Read the last page of El Toro's journal. The final page helps you deduce the correct key to use on the last lock.
Open the X plate on the door to reach this lock. The green cutouts are bronze, and the iron ones are brown in color. Make sure you use the key you got you found on El Toro to open the final lock. When you solve this puzzle, the door opens and you can exit the cave with Bess.
Good work, Nancy, you have saved your friend Bess and solved a three hundred year old mystery at the same time.