Four Houses

The Four Houses puzzle is part of the Secrets of the Past quest. It is given to you by Eva at the Hort.

There are 9 pieces to the puzzle. Each Weathered Picture #X shows you the location of clue X+1 (wrapping around, so Weathered Picture 09 shows you the location of Four Houses Part 1).
 * Four Houses Part 1 (Location shown in Weathered Picture 09)
 * Four Houses Part 2 (Location shown in Weathered Picture 01)
 * Four Houses Part 3 (Location shown in Weathered Picture 02)
 * Four Houses Part 4 (Location shown in Weathered Picture 03)
 * Four Houses Part 5 (Location shown in Weathered Picture 04)
 * Four Houses Part 6 (Location shown in Weathered Picture 05)
 * Four Houses Part 7 (Location shown in Weathered Picture 06)
 * Four Houses Part 8 (Location shown in Weathered Picture 07)
 * Four Houses Part 9 (Location shown in Weathered Picture 08)

Once all 9 pieces are found, Eva will give you the final location. Head to the Castle Ruins of West Ignadon, and find the elevator down. This leads to a large, empty room with two keypads. The same code works in both keypads, and is revealed by solving the Four Houses puzzle. The puzzle itself is a classic logic puzzle, the solution of which gives an age in years (number, 0-9) and relative position for each of 4 houses, identified by color (black, green, white, blue). Determining the correct house order and age mapping gives you a 4-digit number, 7817. Entering this code in each keypad opens up two doors, one leading to a room where Jax can find more primary documentation on the origin of Calaan, and one leading to Calaan itself.