When we were living at Trelangate House from 1972 to 1986 we found a flint scatter on Crousa Downs  at SW76151920.
The mesolithic flint hand axe, pictured in the Flints title page was found near the site by my son Andrew.  The flint core to the left was one of many cores we found.  Some of the finds are stored at Truro Museum in Box 797.

In the photograph to the left you can see a small part of the collection we made.