s ▁True ▁T ales ▁of ▁Bur ied ▁Tre asure ▁by ▁expl orer ▁and ▁historian ▁Edward ▁R owe ▁Snow . ▁In ▁his ▁book , ▁Snow ▁said ▁that ▁he ▁received ▁the ▁set ▁of ▁symbols ▁from ▁Rev . ▁A . ▁T . ▁K empt on ▁of ▁Cambridge , ▁Massachusetts , ▁but ▁no ▁information ▁was ▁provided ▁as ▁to ▁how ▁or ▁where ▁K empt on ▁obtained ▁them . ▁It ▁was ▁found ▁that ▁K empt on ▁had ▁stated ▁in ▁a ▁letter ▁dated ▁April ▁ 1 9 4 9 ▁that ▁he ▁had ▁obtained ▁his ▁information ▁from ▁" a ▁school ▁teacher ▁long ▁since ▁dead ". ▁ ▁In vest ors ▁and ▁expl or ers ▁Franklin ▁Del ano ▁Ro ose vel t , ▁stir red ▁by ▁family ▁stories ▁origin ating ▁from ▁his ▁sail ing ▁and ▁trad ing ▁grand father ▁( and ▁Oak ▁Island ▁financi er ) ▁Warren ▁Del ano , ▁Jr ., ▁began ▁following ▁the ▁mystery ▁in ▁late ▁ 1 9 0 9 ▁and ▁early ▁ 1 9 1 0 . ▁Ro ose vel t ▁continued ▁to ▁follow ▁it ▁until ▁his ▁death ▁in ▁ 1 9 4 5 . ▁Through out ▁his ▁political ▁career , ▁he ▁monitor ed ▁the ▁island ' s ▁recovery ▁attempts ▁and ▁development . ▁Although ▁the ▁president ▁secret ly ▁planned ▁to ▁visit ▁Oak ▁Island ▁in ▁ 1 9 3 9 ▁while ▁he ▁was ▁in ▁Hal if ax , ▁fog ▁and ▁the ▁international ▁situation ▁prevent ed ▁him ▁from ▁doing ▁so . ▁ ▁Australian - American ▁actor ▁Er rol ▁F lyn n ▁inv ested ▁in ▁an ▁Oak ▁Island ▁tre asure ▁dig .