▁cattle , ▁and ▁ended ▁up ▁signing ▁a ▁mut ual ▁aid ▁agreement ▁for ▁such ▁an ▁event ual ity . ▁ ▁The ▁explo itation ▁of ▁the ▁sub so il , ▁which ▁dates ▁back ▁at ▁least ▁ 1 6 1 2 , ▁when ▁an ▁expl oding ▁mine ▁of ▁lead ▁and ▁other ▁of ▁k hol ▁( used ▁in ▁cos met ics ), ▁gain ing ▁momentum ▁with ▁graph ite ▁mine ▁in ▁the ▁last ▁third ▁of ▁the ▁ 1 9 th ▁century ▁. ▁These ▁mines ▁have ▁reached ▁ 1 1 0 ▁workers , ▁drawing ▁up ▁to ▁ 4 0 0 ▁metric ▁tons ▁ann ually ▁in ▁ 1 9 6 3 ▁and ▁closed ▁without ▁de ple ting ▁the ▁gra in ▁graph ite ▁by ▁German ▁competition . ▁ ▁In ▁ 1 8 8 7 ▁the ▁town ▁sold ▁the ▁castle ▁to ▁the ▁sixth ▁count ▁of ▁As al to , ▁a ▁distant ▁relative ▁of ▁Ay ala , ▁who ▁inher its ▁from ▁his ▁son , ▁the ▁Mar quis ▁de ▁Arg ü eso , ▁Member ▁of ▁Parliament ▁for ▁Tar rag ona . ▁For ▁his ▁personal ▁interest ▁is ▁obtained ▁the ▁grant ▁of ▁the ▁phone ▁in ▁ 1 9 2 2 . ▁The ▁castle ▁will ▁not ▁reach ▁the ▁category ▁of ▁historical - art istic ▁monument ▁to ▁ 1 9 6 4 . ▁ ▁In ▁the ▁late ▁ 1 9 th ▁century , ▁being ▁mayor ▁Lorenzo ▁N avas , ▁former ▁colonial ▁governor ▁of ▁Tar lac ▁( Ph ili pp ines ), ▁the ▁old ▁well ▁of ▁the ▁council ▁is ▁replaced ▁by ▁a ▁four - pipe ▁now ▁def unct ▁(