http://chroniclingamerica.loc.gov/lccn/sn83016179/1864-06-30/ed-1/seq-2/#da…
forgery of orders

https://babel.hathitrust.org/cgi/pt?id=miun.adh1877.0001.001;view=1up;seq=2…
account of his life written by Col. Dahlgren's father

http://www.sonofthesouth.net/leefoundation/civil-war/1864/colonel-dahlgren.…
account of death

https://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=4886
http://www.nytimes.com/1865/08/13/news/col-ulric-dahlgren-curious-story-reg…


https://www.loc.gov/resource/ppmsca.22557/
https://en.wikisource.org/wiki/Dahlgren_Papers

https://www.encyclopediavirginia.org/Kilpatrick-Dahlgren_Raid#start_entry

https://rvanews.com/features/civil-war-the-dahlgren-affair/110617
https://vimeo.com/160372457
Green Farm mentioned around 37:30

https://collegian.richmond.edu/cgi-bin/richmond?a=d&d=COL19290503.2.26&…------

from this account in the Collegian, it looks like they may have taken Gamble's Mill road to what was then the President's house. 
RICHMOND COLLEGE IS SCENE OF RAID

https://virginiachronicle.com/?a=d&d=AV18640304.1.6&srpos=1&e=0…-"Green%27s+farm"-------
Fight with the Raiders near Richmond, Abingdon Vriginian 4 Mar 1864, p.6
account of "Yankees and local defence troops, near Green's farm"

https://virginiachronicle.com/?a=d&d=DD18640303.1.2&srpos=14&e=…-"Green%27s+farm"-------
Died, Daily Dispatch, 3 March 1864, p. 2
list of soldiers killed on Green's farm