What is Leopold referring to when he says that X embarked "on a second trip through the bloodstream of the land”?

This a great question however, I cannot answer this because-

answer; (wisconsin);

explanation: the badger state. this nickname originally referred to the lead miners, of the 1830s, who worked at the galena lead mines in illinois. these mines were in northwestern illinois close to the borders of wisconsin and iowa. the wisconsin miners lived, not in houses, but in temporary caves cut into the hillsides.

answer; seattle and los angeles; (west)