Hill doesn't plan to have much contact with Russell for the time being.
Although the child will inevitably recognize him in the future, it's not necessary for it to happen so quickly.
Seven days is enough for the child's memories to blur a bit.
As for the old man in the ring, Hill has already left a message for Russell... There are things he wants in the Magic Tower, and the Side Tower where Master Gilbert resides is not suitable for a soul's stay, so he will temporarily leave.
As for the Magic Book, Hill just needs to manifest content consistent with the books Gilbert has here.
In this world, the apprentice period in the Magic Book, although there are subtle differences from orthodox Spells, is caused by the world's differences, not errors.
Even if Hill could change things, some things can't be changed... After all, they're missing too many positive spells.
Of course, positive energy spells can't be used here either.
