Vitruvius Quote

Trees which grow in places facing the course of the sun are not of porous fiber but are solid, being drained by the dryness... The trees in sunny neighborhoods, therefore, being solidified by the compact texture of their fiber, and not being porous from moisture, are very useful, so far as durability goes, when they are hewn into timber. The lowland firs, being conveyed from sunny places, are better than those highland firs, which are brought here from shady places.

Chapter X "Highland and Lowland Fir" Sec. 1 - De architectura (The Ten Books On Architecture) (~ 15BC) - Book II