Name and year of marriage from:
https://translate.google.co.nz/translate?hl=en&...evis&prev=search

Year and place of birth and death from:
https://www.geni.com/people/Elizabeth/6000000045380442938

Exact date of death, Death Notice, from a 13-pager document compiled by, and received from, Julie Bourke (nee McColl) on 27 April 2017. Julie is the great-great-granddaughter of Emma Frances Devis b. 1814.
St James Chronicle Tuesday March 18 1788
DEATH
Saturday in Upper Wimpole Street suddenly, Mrs Devis, widow of Arthur Devis, late of Great Queen Street, Lincolns Inns fields

From 13-pager ex Julie Bourke:
Morning Post & Daily Advertiser Wednesday 19 March 1788
DEATH
On Saturday evening at her daughter’s house Upper Wimpole Street, died suddenly, Mrs Devis, widow of Mr Arthur Devis, late of Great Queen Street, Lincoln Inns Fields.

Date and place of marriage, 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.

First name spelt as “Elisabeth” in a spreadsheet received by emailed on 8 July 2018. Linda is the x2-great granddaughter of Emma Frances Devis b. 1814.