It is tricky to know what happened, as there is a lot of post-facto redaction. What seems to be absolute is:
ca. 1400: Grant arrives on the field at the Crisp House. He reiterated his previous orders to CF Smith to "keep quiet" (which he contradicts his memoirs) and rode 1,000 yds SW to Wallace and McClernand. He orders them to retreat to the ridgeline and entrench (more later). He returns to the Crisp House.
1430: Grant signals Foote (who has already left to take his ships to be repaired, Cmdr Dove of the
St. Louis received it) that his men were demoralised and he must "order a charge to save appearances".
1500: CF Smith launches a brigade in said charge against 3 rebel companies and overwhelms them. His column is disordered going through the rebel skirmish line and stopped dead by the second rebel line.
1530: Col. Webster reiterates Grant's orders to Wallace and McClernand to retreat.
What was said by Grant to Wallace and McClernand was apparently not an order, as when it was reported Wallace and McClernand had advanced 3 or their 4 remaining brigades (Cruft, ML Smith and Ross) to retake the road, Grant reiterated his original retreat order. Wallace refused to obey.
It me it appears Grant was trying to create a "
Golden Bridge". He wanted to let the rebels escape, probably as he doubted his own position. His 1430 message betrays utter desperation. McClernand and Wallace had determined to ignore their chief and instead "show the Iron Gate".
The next morning, when a rebel came over with a flag of truce to negotiate Smith replied "I make no terms with rebels with arms in their hands - my terms are unconditional and immediate surrender." Smith had stymied his chief, who now could not back down from Smith's challenge to his authority. He one-upped his subordinate by parroting Smith's words, and adding "I propose to move immediately upon your works", which was likely a bluff. Had Grant attacked his men would have been slaughtered. Fortunately for him the rebels were dead set on surrendering, and delivered ca. 11,000 troops to him.