Correction
Foote never commanded the South Atlantic Blockading Squadron
Principal Officers table; Chapter 13, paragraph 4
The packet saysThat Dahlgren "commanded the South Atlantic Blockading Squadron after Rear Adm. Foote's death," and that he "had assumed command … after Rear Admiral Foote's death."
The record showsGideon Welles selected Rear Adm. Andrew H. Foote to relieve Du Pont, but Foote fell ill before going south and died in New York on 26 June 1863 without ever taking up the command. Dahlgren relieved Du Pont directly, on 6 July 1863 — four days before the Morris Island landing.
What to doRecast as: relieved Du Pont on 6 July 1863, after Foote, named to the command, died before he could take it. As written, the packet puts an admiral in a post he never held.