I'll have another look
GRO Index
CARR Ann - 1844 M Quarter in Newbury - mother's maiden name: PLANK
CARR William - 1848 J Quarter in Newbury - mother's maiden name: PLANK
assume: Ann died in childbirth??
CARR Ann, 1848 - J Quarter in Newbury, aged 36.
? As Ann died and John is lodging elsewhere
?
National Archives - Coronor's Papers - 24 June 1848
William CARR (Newbury)
? May be British Newspapers on line have a report
? where are the children in 1851