Rules of syllabification

Question

In Latin Grammar, Robert J. Henle wrote (p. 2),

Accent.

9. a. In words of two syllables the accent is on the first.
   vía; béllum

10. b. In words of more than two syllables, if the second last syllable is long it is accented; otherwise the accent is on the third last syllable.
    vidḗrunt; ágmĭne

Are there any exceptions to these rules? (I’m assuming that Latinized forms of foreign words will be the exception, but I am not certain.)

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References

Henle, Robert J. Latin Grammar. Chicago: Loyola Press, 1958.