They arrived in eastern foothills near Whychus Creek by May or June , and then climbed to higher pastures in August and September .
Shepherds led their herds of 1,500 to 2,500 sheep to the Three Sisters .
Three Sisters arrived in eastern foothills near Whychus Creek by May or June , and then climbed to higher pastures in August and September .
Shepherds led their herds of 1,500 to 2,500 sheep to the Three Sisters .