Name from the “Devis Family Tree” kindly shared by Julie Bourke (nee McColl) received in the post on 3 May 2017. This information is based on original research, including that of Wills, by Linda Burge and Julie Bourke. Linda is the great-great-granddaughter of Emma Frances Devis b. 1814. Julie is the great-great-granddaughter of Emma Frances Devis. Brian of nzolivers.com is a x3-great grandson of Emma Frances Devis.

Date of death, Death Notice, from 13-pager document compiled by, and received from, Julie Bourke (nee McColl) on 27 April 2017:
The Examiner Sunday 29 Nov 1818
DEATH
On Thursday, after a lingering illness, Margaret, the wife of A.W. Devis Esq., of Caroline-street, Bedford Square.

Approximate year of birth from 13-pager ex Julie Bourke who found on the Internet:
https://archive.org/stream/miscellaneagenea5190how...nea5190howa_djvu.txt
Miscellanea Genealogica et Heraldica Monumental Inscriptions St Giles in the Fields
“A plain white marble Tablet – In pious Memory of / Her Father & Mother & only Sister / Arthur William DEVIS, Artist, / Margaret DEVIS & Ellin DEVIS / (who died in the years 1822, 1818, 1826 / respectively aged 59, 34 & 17 / This Tablet is here placed / in the Church where they worshipped / by Isabella, wife of Martin F. Tupper / The Family Tomb having recently been removed”.