In the halfe circle enclosed between the flood-gate and the compasse frith, there is digged a round pit, of three foot diameter, and foure foot depth, frithed on the sides, which is continually fedde with the water soaking from the sayd flood-gate, and serueth to keepe any fish aliue, that you haue before taken, and so to saue ouer often drawing.
1811, Richard Carew, Thomas Tonkin, Francis Basset Baron Basset of Stratton, Carew's Survey of Cornwall, page 249