This is a sentence from a book:
We do not intend here to describe the medieval sense of geographical space in its totality, but briefly to point out some of differences between it and our modern one.
Shouldn't there be the definite article before differences? I thought the sentence reads odd and ungrammatical, and should be rewritten as
We do not intend here to describe the medieval sense of geographical space in its totality, but briefly to point out some of the differences between it and our modern one.
or
We do not intend here to describe the medieval sense of geographical space in its totality, but briefly to point out some differences between it and our modern one.
Am I right?