In his testimony, Augustus Pemberton describes his place as located both in Miner's Bay and along Plumper Pass.1 Therefore, Plumper Pass seems to indicate the passage between Galiano Island, to the northeast, and Mayne Island, to the southwest.
The Colonial Despatches Team.
Plumper Pass.The Colonial Despatches of Vancouver Island and British Columbia 1846-1871, Edition 2.0, ed. The Colonial Despatches Team. Victoria, B.C.: University of Victoria.
https://bcgenesis.uvic.ca/plumper_pass.html.
Last modified: 2020-03-30 13:22:16 -0700 (Mon, 30 Mar 2020) (SVN revision: 4193)