Aiwass, after handling the ceremony site, let Sherlock return to the bishop's house alone.
Sherlock initially resisted this—he had wanted to hide this incident and not tell anyone he knew about his shrinkage. After all, once he was promoted again, he would return to his original size.
This immediately invigorated Sherlock, who had originally had little desire for promotion.
However, he was persuaded by Aiwass's words, "Don't you want to go back to sleep?" Still somewhat reluctant, he chose to obey his body's needs.
—In all fairness, he was indeed a bit sleepy.
After all, he had spent the previous night under the Stupidity Curse, exerting all his effort to learn two subjects he was not good at. Once he roughly mastered them, Aiwass's ritual reformed his body.