IV. Legilimens
Baby Harry was sobbing on the table. Madame Pomfrey – the Order's go-to Healer – shushed him reassuringly and waved a wand over him.
"He doesn't seem to be harmed, Albus," she said, after considering the results from the diagnostic spell.
Dumbledore nods and murmured under his breath. He stroked his beard for a moment and then said, "Thank you, Poppy. That will be all."
Madame Pomfrey looked as though she might protest for a moment before acquiescing. "Alright, Albus." She left quietly, shutting the door behind her.
Dumbledore looked down at Harry Potter and focused on his scar. "Curious," he murmured. Then, with a wave of a hand at the door to ensure it was locked, he turned to Harry and whispered, "Legilimens."
Harry went harshly still for a moment, and Dumbledore knew it was ethically unsound to perform such a spell on a small child, but it was the only way to know what had happened.
Dumbledore searched Harry's mind – saw a toy broomstick, saw Sirius Black (and Dumbledore's nostrils flared for a moment), and Lily's red hair.
Then – there – the moment he had been looking for. Dumbledore watched the scene play out, stood solemn with pride at Lily's sacrifice, and watched the spell rebound upon Voldemort.
Dumbledore left Harry's mind then. Harry immediately squirmed, but he did not cry.
"Ah, my sweet boy," he said, and he picked Harry up.
Dumbledore sent a message off to Hagrid then and told him to drive Harry to his aunt's and uncle's home the next morning.
Dumbledore would have done it himself (and would, in fact, meet Hagrid and Harry there), but he had business to attend to now, a story to share with the wizarding world, and two of his young students to honor.
Voldemort was vanquished, and the world needed to know.