. S . A . ▁( 1 7 3 8 ▁– ▁ 8 ▁August ▁ 1 8 2 3 ) ▁was ▁an ▁Irish ▁historian , ▁anti qu ary ▁and ▁top ograph er . ▁ ▁Life ▁Led wich ▁was ▁born ▁in ▁Dublin , ▁the ▁son ▁of ▁John ▁Led wich , ▁a ▁merchant . ▁He ▁was ▁educated ▁at ▁Tr inity ▁College , ▁Dublin , ▁entering ▁on ▁ 2 2 ▁November ▁ 1 7 5 5 , ▁and ▁taking ▁a ▁B . A . ▁in ▁ 1 7 6 0 ▁and ▁a ▁LL . B . ▁in ▁ 1 7 6 3 . ▁He ▁became ▁vic ar ▁of ▁Ag hab oe ▁in ▁ 1 7 7 2 , ▁which ▁he ▁must ▁have ▁res igned ▁in ▁ 1 7 9 7 , ▁as ▁his ▁successor ▁was ▁then ▁appointed . ▁▁ ▁Led wich ▁died ▁at ▁his ▁house ▁in ▁York ▁Street , ▁Dublin , ▁on ▁ 8 ▁August ▁ 1 8 2 3 . ▁ ▁Works ▁In ▁ 1 7 9 0 , ▁Led wich ▁published ▁his ▁Anti qu ities ▁of ▁Ireland . ▁It ▁was ▁later ▁disc ount ed , ▁because ▁of ▁the ▁imper fect ▁information ▁on ▁Irish ▁history ▁current ▁in ▁his ▁day , ▁and ▁his ▁theories ▁were ▁effect ually ▁set ▁aside ▁by ▁George ▁Pet rie ▁and ▁later ▁writers . ▁In ▁the ▁index ▁to ▁John ▁Lan igan ' s ▁E cc les iast ical ▁History ▁there ▁are ▁err ata ▁to ▁Led wich . ▁His ▁article ▁on ▁the ▁History ▁and ▁Anti qu ities ▁of ▁I ris ht own ▁and ▁Kil