Having checked on Free BMD, Fourniss appears to be a Yorkshire name and relatively few lived in London - which is helpful.
Any marriage details would be useful thanks.
Glad to have been of some help
Here are some marriage details of the Fourniss family
19 Nov 1840 St Sepulchre Holbron
Alfred Fourniss f/a Artist f Matthew Thomas Lewis Artist
Alice Russell Brett f/a f Francis Russell Brett Mariner
Wits Francis Russell & Rose Russell Brett
2 Mar 1851 Gray's Inn Road Holy Trinity
Thomas Charles Fourniss f/a
widow Ornamental Painter f Thomas Ornamental Painter
Margaret Downes f John Tailor
Wits Matthew Thomas Lewis Fourniss & Jane Downes
looks as if Thomas' first wife was named Ann
1841 c
HO107; P 1084; Book: 5; Civil Parish: St George The Martyr E D 9; F10; Page: 12
Thomas Chas 24 Painter, Ann 25
Bapt St John the Evangelist Lambeth
Sarah 5 Apr 1837 parents Thomas Charles Fourniss occ Painter &
Ann abode Windmill Street
7 Feb 1885 St Pancras
Charles John Fourniss occ Artist father dead married Hepzibah Lee
f Joseph Horsekeeper, Both single, both signed wits H E & A Lee
17 Apr 1853 Gray's Inn Road Holy Trinity
Elizabeth Fourniss age 24 father Matthew Thomas Lewis occ Artist
George Buffham age 23 Engineer f John Servant
Wits Matthew Thomas Lewis & Thomas Charles Fourniss
18 Dec 1854
Rosetta Jane Fourniss minor father Matthew Thomas Lewis Flower occ Painter
George William Mansfield f/a Piano Forte Maker f Edward (dec’d)
Wits Matthew Thomas Lewis Fourniss & Mary Ann Peaple
There are baptisms for Thomas & Margaret's children, some marriages etc....
Please let me know if you require these may take a while to sort everything & type the info. out
As this thread is about your Aldrich family and this info. is for Mary Ann Aldrich nee Fourniss' siblings
If you do require more details about the Fourniss family
do you want me to add the info. here
or
would you prefer me to PM (personal message) you ?
Let me know either way
Do you have access to census info.?