act us ▁in ▁a ▁vast ▁pra irie ;" ▁he ▁says ▁it ▁la cks ▁an ▁effective ▁beginning ▁and ▁a ▁typical ▁viol in ▁technique . ▁And ▁specifically ▁address ing ▁the ▁finale : ▁" It ▁was ▁a ▁dangerous ▁thought ▁from ▁the ▁very ▁beginning , ▁to ▁make ▁a ▁perpet ual ▁motion ▁movement ▁... without ▁a ▁breath ▁of ▁rest ▁and ▁without ▁mel od ic ▁parts ... a ▁ris ky ▁t ires ome ▁ending ... it ▁was ▁a ▁wrong ▁idea , ▁and ▁Mr . ▁Bar ber ▁should ▁admit ▁this ." ▁Me iff ▁therefore ▁felt ▁it ▁his ▁duty ▁" to ▁advise ▁I so ▁not ▁to ▁do ▁it ." ▁On ▁the ▁positive ▁side , ▁he ▁acknowled ges ▁that ▁"... it ▁has ▁many ▁beautiful ▁parts " ▁and ▁that ▁he ▁has ▁" person al ▁adm iration ▁for ▁the ▁composer ▁for ▁himself ▁personally ▁and ▁mus ically ." ▁▁▁ ▁But ▁there ▁is ▁never ▁any ▁evidence ▁or ▁assertion ▁by ▁Br is elli ▁or ▁cont ention ▁by ▁Bar ber ▁that ▁Br is elli ▁found ▁the ▁third ▁movement ▁too ▁difficult ▁to ▁play . ▁As ▁to ▁the ▁up coming ▁premi ere ▁performance , ▁in ▁place ▁of ▁the ▁Bar ber , ▁Br is elli ▁subst it uted ▁D vo ř ák ' s ▁Vi olin ▁Con cer to . ▁ ▁Bar ber ' s ▁letter ▁of ▁December ▁ 1 4 ▁to ▁F els ▁ident ifies ▁his ▁intention ▁with ▁regard ▁to ▁the ▁third ▁movement : ▁Bar ber ▁( now ▁teaching ▁at ▁the ▁Curt is ▁Institute ) ▁set ▁up ▁a ▁test ▁of ▁play ability ▁to ▁ass ure ▁himself ▁what ▁he ▁was ▁giving