I found the morose philosophers (Nietzsche, Schopenhauer, Spengler) the most interesting.
Spengler wanted to know how I was getting all this information.
Comparative historians like Spengler, Pareto and Toynbee realized that history did not merely happen but had some kind of pattern.
A local doctor, by name Spengler, first noticed this fact about 1865, and the valley soon became famous.
Base flat, and this holds good, as remarked by Spengler, even when the specimens are attached to cylindrical pieces of wood.