For death registration try Emma Hall, aged 79, Peterborough registration district 3b 203 September quarter 1922.
For burial I would suggest that you first look in the burial register for Crowland. Not online or indexed to my knowledge. If you're unable to access the registers** yourself then ask Lincolnshire Archives. If Emma is buried in Crowland they should be able to send you a copy of the entry for a small fee.
**obviously available at Lincolnshire Archives or LDS film number 1542010