That brought back some memories reviewing the photos of Pueblo Bonito. I'd forgotten about the wall alignment. Another interesting tidbit about Bonito is that the kivas are not, truly, subterranean. There's a layer of rock beneath the pueblo and the builders of Bonito could not excavate out their kivas. What they did was build the walls of the kiva and then haul the dirt in from the surrounding area to make it appear the kivas were subterranean. They hauled a lot of dirt. Also, the wood for the roof beams and other parts of the structures was hauled from over 50 miles away. They constantly reused wood so it was difficult to get a reliable dendrochronologic date for a particular structure. Remember, a dendro date would tell you only when the tree was cut, not how long it was used. I did a number of archeomagnetic (paleomagnetic) surveys of kilns and fire pits of structures and there was sometimes a big discrepancy between my dates and those posted for the same structures using dendro and radiocarbon dating. Also, various pottery styles excavated from a structure didn't match the dendro dates for that structure. Ah, the memories.