That the mind exists within physical boundaries, (ie, quantitative material, temporal, or spatial relationships) has not been demonstrated.
The entire field of psychopharmacology rests on the assumption that the mind has a physical basis. Substances that alter the functioning of the brain will make your mind work differently. Also, brain lesions may severely limit what your mind can do. This very strongly suggests that the mind is not only experienced "through" the brain, but that it originates in the brain. Equally important evidence is the fact that nothing else affects the functioning of the mind; if you want to alter it, you need to tinker with the brain.
I did a search about property dualism and I couldn't see much written here on this site.