It looks convincing, but we cannot say with certainty.
Perhaps the continuations that cross the binding gutter are just doodles.
In the first case, perhaps the fold was just not made in exactly the right place and some minor part ended up on the wrong side. (There are plenty of cases with drawing or paint disappearing in the binding gutter).
Perhaps the continuations that cross the binding gutter are just doodles.
In the first case, perhaps the fold was just not made in exactly the right place and some minor part ended up on the wrong side. (There are plenty of cases with drawing or paint disappearing in the binding gutter).