▁the ▁wall ▁into ▁Marshall and , ▁known ▁as ▁being ▁' D uck ed ▁and ▁T oss ed '. ▁ ▁The ▁murder ▁of ▁Mary ▁Spe ir ▁G unn ▁happened ▁at ▁North bank ▁C ott age , ▁Port enc ross , ▁in ▁ 1 9 1 3 . ▁She ▁was ▁a ▁grand d augh ter ▁of ▁Margaret ▁Gib son ▁Sp ier , ▁and ▁the ▁murder ▁remains ▁un sol ved ▁to ▁this ▁day . ▁ ▁Dr ▁Third ▁retired ▁in ▁ 1 9 1 9 , ▁and ▁later ▁head master s ▁of ▁the ▁school ▁and ▁was ▁succeeded ▁briefly ▁by ▁Alexander ▁E ms lie ▁( 1 9 1 9 – 1 9 2 1 ) ▁and ▁then ▁by ▁Gilbert ▁R . ▁M air ▁( 1 9 2 1 – 1 9 3 7 ). ▁ ▁The ▁number ▁on ▁the ▁school ▁roll ▁was ▁ 3 1 0 ▁in ▁ 1 9 3 3 , ▁and ▁it ▁reached ▁a ▁high ▁point ▁of ▁over ▁ 3 5 0 ▁after ▁new ▁class rooms ▁were ▁added . ▁By ▁ 1 9 3 2 , ▁however , ▁the ▁school ▁was ▁in ▁financial ▁difficulties , ▁and ▁in ▁ 1 9 3 6 , ▁after ▁a ▁prolong ed ▁campaign , ▁the ▁county ▁education ▁authority ▁took ▁over ▁the ▁school . ▁ ▁In ▁ 1 9 3 7 , ▁soon ▁after ▁the ▁take over ▁by ▁A yr shire , ▁a ▁new ▁head master , ▁Robert ▁R . ▁Fair ley , ▁was ▁appointed , ▁and ▁he ▁remained ▁in ▁post ▁until ▁ 1 9 6 3 , ▁when ▁he ▁was