Pen-carou, Pen-caro, alias Pen-carow, i. e. head-deer, or chief-deer, formerly part of the Peverell’s deer-park; and from thence so denominated, as some think. But when I consider that Caer-kynock, or Caer-kunock, is situate on the lands thereof, now called Castle-kynock, i. e. the king, prince, or sovereign’s castle, extant here long before the Norman Conquest, I take the modern name Pen-carow only to be a corruption of Pen-caer-ou, or Pen-caer-ow, i. e. my head castle, or city, intrenched or fortified place, according to the artificial and natural circumstances thereof, it being on a high hill, overlooking the contiguous country, the ruins are of the largest British camp or intrenchment that ever I saw in Cornwall, containing about 100 acres of land, and consisting of a four-fold rampart, yet of a great height in some places, with several platforms or counterscarps within the same, for offence or defence, in case of storm or surprise. [The camp in Pencarrow Park has a double vallum, the inner one oval, inclosing an area 250 feet by 200; the outer one of an irregular form. On the east side, at the distance of about 700 feet from this camp, are some extensive outworks. _Lysons._] This barton gave name and original to an old family of gentlemen, surnamed De Pen-carow, who siding with Richard the Third against Henry the Seventh, as some say, but, as others will have it, with Flammock, in his insurrection against that King, he lost this place, and other lands, by attainder of treason (see Bocarne, in BODMIN), having before conveyed a great part of his estate to Henry the first Lord Marney, of Colquitta, to procure a reprieve, or pardon of his life, from that king; from whose heirs it came to the Walkers of Exeter, by descent or purchase, and from them to John Molesworth, of Tretane, Esq. first but an attorney-at-law, afterwards commissioner or auditor to Queen Elizabeth in those parts for the Duchy of Cornwall, that married one of the coheirs of Hender, so called from the parish of Molesworth, in Lightstone hundred, in the county of Huntingdon.