Statistics for occurrence #1 of “Longstreet” in chapter 5, page 175 of William Swinton, Campaigns of the Army of the Potomac:
...on Robertson's River, a branch of the Rapidan.
Banks was posted at Culpepper.
On the arrival of Longstreet, Jackson advanced from Gordonsville to the Rapidan, waited till the 20th of August for Longstreet to come up, when they crossed at Raccoon and Somerville fords.
...