▁▁ 1 9 7 3 ▁R ally e ▁de ▁Portugal , ▁W RC ▁Round ▁ 3 ▁at ▁R ally e - info ▁ ▁Portugal ▁R ally ▁of ▁Portugal ▁Category : R ally ▁de ▁Portugal <0x0A> </s> ▁Salt ▁Island ▁() ▁is ▁joined ▁to ▁Holy ▁Island , ▁Ang les ey , ▁in ▁North ▁Wales . ▁It ▁is ▁a ▁natural ▁provider ▁of ▁shelter ▁for ▁the ▁town ' s ▁Old ▁Har bour ▁from ▁the ▁Irish ▁Sea ▁and ▁is ▁part ▁of ▁the ▁Port ▁of ▁Holy head . ▁ ▁History ▁The ▁island ▁gained ▁its ▁name ▁by ▁a ▁factory ▁located ▁on ▁it ▁which ▁processed ▁sea ▁water ▁in ▁order ▁to ▁extract ▁sea ▁salt . ▁By ▁the ▁early ▁ 1 8 th ▁century , ▁the ▁sea ▁salt ▁was ▁often ▁mixed ▁with ▁rock ▁salt ▁( o ften ▁sm ugg led ▁onto ▁the ▁island ) ▁to ▁increase ▁the ▁quality ▁of ▁the ▁factory ' s ▁product . ▁The ▁factory ▁ceased ▁production ▁in ▁ 1 7 7 5 . ▁ ▁Another ▁building ▁no ▁longer ▁standing ▁on ▁the ▁island ▁was ▁the ▁Stanley ▁S ail or ' s ▁Hospital . ▁This ▁hospital ▁was ▁set ▁up ▁in ▁ 1 8 7 1 ▁by ▁a ▁local ▁phil anth rop ist ▁and ▁initially ▁only ▁treated ▁sail ors ▁although ▁it ▁quickly ▁became ▁a ▁general ▁hospital . ▁It ▁was ▁taken ▁over ▁by ▁the ▁National ▁Health ▁Service ▁in ▁ 1 9 4 8 ▁and ▁closed ▁its ▁doors ▁in ▁ 1 9 8 7 . ▁ ▁L ighth ouse ▁ ▁There ▁have ▁been ▁three ▁l ighth ouses ▁located ▁on ▁the ▁island . ▁The ▁current ▁l