In the last years of his life Grosmont's father was blind and spent his remaining few years at Leicester Castle. It maybe due to his medical afflictions and the reliance on his son that in 1331 he founded an infirmary for the poor in Leicester. Henry of Lancaster died in 1345 and was buried at Leicester Castle.
You can read more of Henry of Grosmont in Kathyrn's blog at
edwardthesecond.blogspot.co.uk/2009/08/verray-parfit-gentil-knyght-henry-of.html