To view the original post, please click hereYou're right. There is a small stretch of land South/Southeast of the Clothier shop on shore near Vesper where they will spawn, apologies as I missed that at first when I looked at the region. The Yew area you described is outside of the Yew City region and mobs don't spawn there.Why would the Vesper region not cover on shore when Captains spawn up there?
In Yew, it was at house just east of the Jail.