In 1492 , Emperor Frederick III appointed Eberhard I as Henry 's legal guardian .
In 1490 , his cousin Eberhard I had Henry arrested in Stuttgart , on the grounds of an alleged mental illness .
In 1492 , Emperor Frederick III appointed Eberhard   as Henry 's legal guardian .
In 1490 , his cousin Eberhard I had Henry arrested in Stuttgart , on the grounds of an alleged mental illness .