What is "criggan"

Criggan is a hamlet in Cornwall, England, UK, located north of the village of Bugle. It lies on the edge of Criggan Moor, within an Area of Great Scientific Value. It lies along the railway line from Victoria and Roche railway station in the west to Bugle in the south.

The settlement is mentioned in Herman Melville's The Piazza Tales (1856) which says 'In Criggan last month, I put up three-and-twenty rods on only five buildings.' 'Let me see. Was it not at Criggan last week, about midnight on Saturday, that the steeple, the big elm and the assembly-room cupola were struck?.'