Hi
The National Archives has an online register of surviving deposited business and organisational papers and their whereabouts
http://www.nationalarchives.gov.uk/nra/searches/simpleSearch.asp?subjectType=OThe index holds nothing for Day and Son (printers)
St John the Evangelist, Upper Holloway 3rd January 1854
John Bellenie Day Full Bachelor Gent Holloway Wiliam Day Gent
Rose Isabel Rees Minor Holloway William Lee Rees Gent
Both signed
Witnesses May Rees and ?
1st April 1846 St John the Evangelist, Upper Holloway
William Day Full Bachelor Gent Holloway William Day
Elizabeth Rees Minor Spinster Parish of West Molesey Surrey James Rees
Both signed
Witnesses Alfred P? and James B?
St George the Martyr, Queen Square, Holborn/Camden
Baptisms - all parents William and Caroline
23rd May 1819
Caroline Ann Day, 5 Orange Street, father's occupation baker
10th September 1820
Sarah Bellanie Day, Orange Street, father's occuaption baker
2nd May 1823
William Day, Great Queen Street, father's occupation proprietor of Golands Lohan
5th January 1825
Emma Day, Great Queen Street, father's occupation Lithographic printer
28th January 1827
Frederick Day, 39 Great Queen Street, father's occupation Lithographic printer
7th February 1830
John Bellenie Day, Gate Street St Giles, father's occupation Lithographic printer
5th September 1834 born 3rd August
Emma Anna Maria Markwell Day, Gates Street, Lincolns Inn Fields, father's occupation Lithographer
1851 census HO107 1501 folio 276
Leas? Tree Cottage Tollington? Row Islington
Caroline Day 56 Head Widow Lithographic and copper plate printer employing 18 men St George the Martyr Middlesex
Joseph Day 22 Son
same occupation as mother St Giles in the Fields Middlesex
John B Day 21 Son
same occupation as mother St Giles in the Fields Middlesex
Emma A M K Day 16 Daughter St Giles in the Fields Middlesex
Eliza Jane Brice 19 Visitor Taunton Somerset
plus 1 servant
Joseph married Eliza Jane Brice in 1851 St John the Evangelist, Upper Holloway
1841 census HO107 673/6 folio 18
Great Queen Street St Giles in the Fileds
Wm Day 45 Lithographer
Caroline Day 45
Caroline Day 20
Wm Day 15
Joseph Day 13
John Day 11
Mary Day 20
Anna Day 6
all born Middlesex
Mary Day married in 1849 to Robert Kent Thomas at St John the Evangelist, Upper Holloway
St John the Baptist, Clerkenwell 1st June 1817
William Day
Caroline Bellenie
Bachelor and spinster of the parish
Both signed
Married by banns
Witnesses Henry George Holden and Ann Bellenie
Regards
Valda