Grief fills the room up of my absent child

From Shakespeare The World as Stage by Bill Bryson.  Chapter 6 page 119.

For Shakespeare there was a personal dimension to the gloom of the decade. In August 1596 his son, Hamnet, aged eleven, died in Stratford of causes unknown. We have no idea how Shakespeare bore this loss, but if ever there was a moment when we can glimpse Shakespeare the man in his plays, surely it is in these lines, written for King John probably in that year:

 

Grief fills the room up of my absent child,

Lies in his bed, walks up and down with me,

Puts on his pretty looks, repeats his words,

Remembers me of all his gracious parts,

Stuffs out his vacant garments with his form.