This classic tale of things going just 'a little awry' just got a mention at the "Emerging Civil War Blog", they have included the whole tale in their post and included a link to a dramatization on YouTube
https://emergingcivilwar.com/2017/10/11/if-grant-had-been-drinking-at-appomattox-by-james-thurber/
https://emergingcivilwar.com/2017/10/11/if-grant-had-been-drinking-at-appomattox-by-james-thurber/