9 7 0 . ▁Cad w ▁( the ▁Wel sh ▁Assembly ▁Government ▁body ▁responsible ▁for ▁the ▁built ▁her itage ▁of ▁Wales ▁and ▁the ▁inclusion ▁of ▁Wel sh ▁buildings ▁on ▁the ▁stat ut ory ▁lists ) ▁states ▁that ▁St ▁Mary ' s ▁has ▁been ▁listed ▁because ▁it ▁is ▁" a ▁good ▁rural ▁church ▁retain ing ▁substantial ▁medieval ▁fabric ". ▁ ▁Writing ▁in ▁ 1 8 4 7 , ▁the ▁cl erg yman ▁and ▁anti qu arian ▁Harry ▁Long ue ville ▁Jones ▁said ▁that ▁St ▁Mary ' s , ▁which ▁he ▁called ▁" a ▁rather ▁long ▁and ▁low ▁building ", ▁was ▁situated ▁" in ▁an ▁une ven , ▁rock y , ▁and ▁exposed ▁local ity " ▁within ▁a ▁parish ▁that ▁had ▁a ▁" pe cul iar ly ▁ble ak ▁and ▁des olate ▁appearance ". ▁He ▁also ▁thought ▁that ▁the ▁roof ▁of ▁the ▁church ▁was ▁" remark able ▁for ▁the ▁quantity ▁of ▁good , ▁but ▁light , ▁tim ber ▁used ▁in ▁its ▁construction ." ▁ ▁References ▁ ▁External ▁links ▁▁ ▁Phot ograph s ▁of ▁the ▁church ▁ ▁Church ▁architect ural ▁plans ▁from ▁the ▁ 1 9 th ▁century : ▁ ▁Gr ound plan ▁ ▁Gr ound plan , ▁elev ation ▁and ▁section ▁ ▁Gr ound plan ▁and ▁elev ation ▁ ▁L lan f air ▁Math af arn ▁E ith af , ▁St ▁Mary ▁L lan f air ▁Math af arn ▁E ith af , ▁St ▁Mary ▁Category : 1 4 th - century ▁churches ▁Category : L lan f air - Math af arn - E