Throughout the next century in Colonial America, the treatment of the mentally insane was barbaric.  The mentally insane people that did not have family or friends to take responsibility were placed in prisions with everyday criminals.  They were chained to walls, unclothed no matter the temperature, and were left in there own filth.  Those that did have family that took responsibility for them were often still hidden so that they wouldn't bring embarrassment to the family.

A cell for the mentally insane.
Mentally Insane Cell
This image shows a cell in which the mentally insane were kept. The photograph shows how little the patients were given, all that is shown is a pillow on a hardwood floor with no bed, and the "prisoners" were chained to the wall.google images