I believe this is the one.
But Anderson declined to exploit the opening. For reasons that remain unclear, the Confederates held fast on the southern end of Henry Hill. Perhaps the growing darkness intimidated Anderson or the lack of direct guidance from Longstreet and Lee left him hesitant to act. Whatever the cause, Anderson's timidity squandered the opportunity earned by three hours of the most intense fighting of the battle.
North of the turnpike, Stonewall Jackson also failed to apply timely pressure against Pope's reeling legions, but his inactivity is easier to explain. Greatly worn by their three days of incessant fighting and facing, at least initially, the bulk of the Federal army, Jackson's divisions did not begin their portion of the counterattack until 6:00 P.M. But when they did assault, "they came on like demons emerging from the earth." Jackson overran a substantial number of Union artillery and infantry units, but his advance coincided with Pope's orchestrated withdrawal, contributing to the ease with which Jackson achieved his captures. Despite mounting losses, by 7:00 P.M. Pope managed to establish an unbroken line north of the turnpike aligning with the Federal position on Henry Hill. Thus Jackson, like Longstreet, had no choice but to remain content with a substantial tactical victory and the attendant spoils of war while a defeated but intact Union army prepared to leave the field.
Pope issued orders to retreat at 8:00 P.M. as the sounds of battle ebbed away in the darkness. Thanks to its successful defense of Henry Hill, most of the army could use the turnpike and its stone bridge across Bull Run to effect its withdrawal. The gloom of the night and his men's sheer exhaustion extinguished any notion Lee may have nurtured to pursue or harass the Federal flight. By 11:00 P.M. Pope's troops had left the field "with perfect coolness and in good order" and begun to enter the relative safety of the Centreville defenses. Here Franklin's pristine brigades cruelly taunted Pope's veterans as they trudged toward waiting bivoaucs and a well-deserved night's rest.
https://www.nps.gov/parkhistory/online_books/civil_war_series/18/sec7.htm#2
https://www.nps.gov/parkhistory/online_books/civil_war_series/18/sec7.htm