▁of ▁sizes ▁was ▁not ▁ultimately ▁produced , ▁this ▁st ip ulation ▁may ▁have ▁been ▁the ▁germ ▁of ▁the ▁decision ▁to ▁adopt ▁a ▁new ▁size ▁and ▁new ▁shape ▁for ▁the ▁p ict orial s . ▁ ▁In ▁fact , ▁the ▁ 1 8 6 9 ▁issue ▁was ▁the ▁first ▁that ▁offered ▁design ers ▁the ▁opportunity ▁to ▁plan ▁an ▁om n ibus ▁U . S . ▁definit ive ▁series ▁as ▁a ▁coh er ent ▁whole , ▁with ▁the ▁subjects ▁and ▁visual ▁styles ▁of ▁individual ▁st amps ▁chosen ▁to ▁harm on ize ▁with ▁one ▁another ▁in ▁the ▁context ▁of ▁an ▁overall ▁plan . ▁The ▁ 1 8 5 1 – 6 1 ▁series ▁had ▁grown ▁pie c eme al , ▁beginning ▁with ▁only ▁three ▁st amps ▁to ▁which ▁five ▁more ▁were ▁ha ph az ard ly ▁added , ▁resulting ▁in ▁a ▁l ops ided ▁p ant he on ▁( W ashington ▁g rac ed ▁no ▁fewer ▁than ▁five ▁of ▁the ▁st amps ). ▁The ▁next ▁issue , ▁of ▁ 1 8 6 1 , ▁had ▁to ▁be ▁prepared ▁hast ily ▁( the ▁aim ▁was ▁to ▁prevent ▁the ▁Confeder acy ▁from ▁converting ▁previous ▁U . S . ▁st amps ▁into ▁c ash ), ▁and ▁as ▁a ▁result , ▁no ▁thought ▁was ▁given ▁to ▁appropriate ▁stamp ▁subjects : ▁on ▁each ▁den om ination ▁the ▁same ▁states man ▁was ▁dep icted ▁as ▁in ▁the ▁previous ▁series . ▁ ▁In ▁contrast ▁to ▁these ▁almost ▁accident al ▁accum ulations , ▁" the ▁new ▁series ▁was ▁intended ▁in ▁some ▁sort ▁to ▁port