I have yet to delve into the Miles family my Dad lived with and also look at Edmund's siblings. I don't see any record of a second marriage only that Edmund died at Still House Monmouth. Can anyone tell me what this place was ?

"Still House" ? I'd like to see the original to confirm the transcription of "Still", its not a name I recognise or a variant.

Instinct tells me it may have been an almshouse / poor house where he was lodging...

its unlikely to be a transcription of Jones' Almshouses Monmouth ( or Newland)
http://www.britishlistedbuildings.co.uk/wa-2245-jones-almshouses-part-of-monmouth-boys-...

http://www.monmouth-today.co.uk/news.cfm?id=7499&headline=Demolition of almshouses begins