From page 70 of Epstein:
'Lieutenant General Macdonald arrived sometime between April 23 and April 28. Macdonald's memoirs indicate that he reached Viceregal headquarters while it was still at Vicenza, which meant April 23. However, in his memoirs, Macdonald wrote himself into the role of savior of the Army of Italy and conveniently avoided mentioning specific dates. Macdonald took credit for reviving Eugene's spirits at Vicenza and claimed that it was his own idea to retire towards the Adige.'
'Macdonald's claims are false, since Eugene's correspondence proves that a withdrawal to the Adige was determined on April 17, well before Macdonald's arrival. If Macdonald's appearance was so important, Eugene might well have reported it to Napoleon; however, he did not, and Macdonald's name is not even mentioned in Eugene's letters until the end of April. Du Casse in his biographical section places Macdonald's arrival on April 28, when Eugene's headquarters was already at Caldiero.'