que ▁jo ke , ▁and ▁would ▁laugh . ▁ ▁Despite ▁his ▁lack ▁of ▁formal ▁education , ▁he ▁wrote ▁many ▁books , ▁including ▁his ▁aut obi ography , ▁Gr ou cho ▁and ▁Me ▁( 1 9 5 9 ) ▁and ▁Mem oir s ▁of ▁a ▁Mang y ▁L over ▁( 1 9 6 3 ). ▁He ▁was ▁a ▁friend ▁of ▁such ▁literary ▁figures ▁as ▁Bo oth ▁T ark ington , ▁T . ▁S . ▁Eli ot ▁and ▁Carl ▁Sand burg . ▁Much ▁of ▁his ▁personal ▁correspond ence ▁with ▁those ▁and ▁other ▁figures ▁is ▁featured ▁in ▁the ▁book ▁The ▁Gr ou cho ▁Let ters ▁( 1 9 6 7 ) ▁with ▁an ▁introduction ▁and ▁comment ary ▁on ▁the ▁letters ▁written ▁by ▁Marx , ▁who ▁don ated ▁his ▁letters ▁to ▁the ▁Library ▁of ▁Congress . ▁His ▁daughter ▁Mi ri am ▁published ▁a ▁collection ▁of ▁his ▁letters ▁to ▁her ▁in ▁ 1 9 9 2 ▁titled ▁Love , ▁Gr ou cho . ▁ ▁Marx ▁made ▁serious ▁efforts ▁to ▁learn ▁to ▁play ▁the ▁guitar . ▁In ▁the ▁ 1 9 3 2 ▁film ▁Hor se ▁Fe athers , ▁he ▁performs ▁the ▁film ' s ▁love ▁theme ▁" Every one ▁S ays ▁I ▁Love ▁You " ▁for ▁cost ar ▁Th el ma ▁Tod d ▁on ▁a ▁Gib son ▁L - 5 . ▁ ▁In ▁July ▁ 1 9 3 7 , ▁an ▁America ▁vs ▁England ▁pro - ce le br ity ▁tennis ▁doubles ▁match ▁was ▁organized , ▁featuring ▁Marx ▁and ▁Ell sw orth ▁V ines ▁playing ▁against ▁Charlie ▁Chap