▁of ▁films ▁in ▁play .' ▁ ▁Under ▁For bes ' s ▁leadership , ▁the ▁studio ▁produced ▁The ▁Railway ▁Children ▁( 1 9 7 0 ), ▁The ▁T ales ▁of ▁Beat rix ▁Pot ter ▁( 1 9 7 1 ) ▁and ▁The ▁Go - B et ween ▁( 1 9 7 1 ), ▁all ▁successful . ▁His ▁ten ure , ▁though , ▁was ▁marked ▁by ▁financial ▁problems ▁and ▁failed ▁projects , ▁and ▁he ▁res igned ▁in ▁ 1 9 7 1 . ▁ ▁Co inc iding ▁with ▁his ▁time ▁at ▁E MI ▁Films , ▁he ▁res umed ▁director ial ▁work ▁with ▁The ▁R aging ▁Moon ▁( 1 9 7 1 ), ▁st arring ▁his ▁wife , ▁Nan ette ▁New man , ▁and ▁Mal col m ▁Mc D ow ell . ▁ ▁Later ▁career ▁From ▁the ▁early ▁ 1 9 7 0 s , ▁For bes ▁divided ▁his ▁energ ies ▁between ▁cinema , ▁television , ▁theatre , ▁and ▁writing . ▁In ▁ 1 9 7 2 ▁he ▁started ▁work ▁on ▁the ▁document ary ▁El ton ▁John ▁and ▁Bern ie ▁T au pin ▁Say ▁Good bye ▁Norm a ▁Jean ▁and ▁Other ▁Things ▁( 1 9 7 3 ), ▁which ▁chron ic led ▁the ▁life ▁of ▁the ▁young ▁El ton ▁John ▁and ▁Bern ie ▁T au pin . ▁T aking ▁a ▁full ▁year ▁to ▁complete , ▁the ▁project ▁gave ▁a ▁behind - the - sc enes ▁look ▁at ▁the ▁writing ▁and ▁recording ▁of ▁Good bye ▁Y ellow ▁Br ick ▁Road . ▁Besides ▁foot age ▁of ▁the ▁John