I know it's been a few days since anyone added to this thread, but I have been reviewing another incident cited by Chernow in Grant, and wanted to try to look into some of Chernow's sources. One of the most-cited accusations of drunkenness against Gen. Grant during the Civil War was that he was drunk when he was injured in a horse-riding accident in New Orleans in Sept. 1863. It seems to me that other histories tend to claim that the evidence of Grant's drinking in this case was limited and sketchy. However, Chernow seems to come down on the side of alcohol as the culprit in this case:
"On September 4, Banks staged a grand review in Grant's honor in the nearby suburb of Carrollton. By all accounts, it was a poignant moment for Grant, who at first trotted so briskly by the assembled troops that other generals had difficulty keeping pace. Then he paused on horseback in the shade of an oak tree, wearing his black felt hat and drawing on a cigar. As he surveyed passing troops, regiments carried banners inscribed with the names of his famous victories and Grant tipped his hat to the veterans flashing by. Once the review was over, Grant and other participants repaired to 'a handsome déjeuner—music, wine, choruses, etc.,' and the wine mentioned may have been his undoing." (Page 301)
I've seen that latter fragmentary quote about the déjeuner used in other histories, and as far as I can tell it comes from a letter Banks wrote to his wife, which letter rests in archives not yet digitized. But the editorial comment "the wine mentioned may have been [Grant's] undoing" is entirely Chernow's.
Chernow backs up his thinking with references to other officers supposedly knowledgeable about Grant's fall:
"Several—though hardly all—of the officers present attributed Grant's accident to drinking. 'I am frightened when I think that he is a drunkard,' Banks told his wife. 'His accident was caused by this, which was too manifest to all who saw him.' No less damaging in historical annals was a letter General William B. Franklin, a former West Point classmate of Grant's, subsequently wrote to McClellan about Grant's visit. 'He at once got into the most tremendous frolic, was drunk all over the city for forty-eight hours.' After reviewing troops and eating lunch, Grant had 'galloped over an exceedingly dusty road full split, tumbled head over heels & was badly hurt.' This report reverberated through the years and as late as 1885 Mark Twain reported that 'Franklin saw Grant tumble from his horse drunk while reviewing troops in New Orleans.' In another letter, Franklin blamed Grant's lapse on Julia's absence. 'When I saw Grant in Vicksburg about Aug. 1, he was perfectly straight & told me that he had drunk nothing during the war. I was as you can imagine somewhat surprised when I saw him in New Orleans. But Mrs. Gr[ant], a cross-eyed very ugly woman was at Vicksburg, and there was no such woman at New Orleans.' Sylvanus Cadwallader, the unreliable journalist who embellished Grant's drinking at Satartia, remembered gossip swirling around Grant's headquarters that he was 'thrown from his horse on his return from a review of Gen. Banks's troops' and that it 'was solely due to his drinking.'" (Pages 302-3)
This detailed treatment of the New Orleans accident does support the idea that Chernow believes Grant had a alcohol problem, although I'm not sure that it contributes to a 'triumph over alcoholism' theme, which has been kind of a chief complaint against Chernow.
ARB