Re. the "newydd" -
"With regard to the ruin of Foxhall, vol iv page 69, it would appear from Pennant that it is only one wing of a design of John Panton, Recorder of Denbighshire and M.P., 1592 and 1601, and that it was afterwards bought by the Rosendales of the true or old Foxhall, adjoining"
(Archaelogia Cambrensis, 1 Jan 1853)