Sure, he'll practice catching Read Magic a few times, and then dismiss it if he hasn't failed accidentally after 6 casts.  That spell doesn't obviously seem very useful, except that it was a spell whose look and feel he remembered.

Now prepare Mage Hand and Message.  Then if he tries to prepare Read Magic again, he'll be past the 4-limit, right?  What happens?

Sure, he'll practice catching Read Magic a few times, and then dismiss it if he hasn't failed accidentally after 6 casts.  That spell doesn't obviously seem very useful, except that it was a spell whose look and feel he remembered.

Now prepare Mage Hand and Message.  Then if he tries to prepare Read Magic again, he'll be past the 4-limit, right?  What happens?