The Sun Office Insurance Records (Guildhall Library) show that Wilhelm, or Christian Wilhelm Mertens, was living at 99 Wardour St, Soho (next to Jacob Erat's premises) on the 4th July 1816, or two years after his apprenticeship had finished. He then appears at 36 Margaret Street, Cavendish Square in 1817 (probably the premises mentioned in the will of Elizabeth Warner below). And by 9th July 1818, he is insuring at 80 Berwick St. , when he is described as a Grocer and Oilman.
From another document held at the London Metropolitan Archive Ref MJ/R/P/012/048 dated 1832 (details kindly supplied by Mike Baldwin), William Mertens was required to keep the Peace, and his address has changed to Lambeth, Surrey.
Middlesex to wit.} William Mertens of Number 33 George Street, Grays Walk, Lambeth, Surrey, Harp Maker Acknowledges himself to be indebted to our Sovereign Lord the King in the Sum of twenty Pounds William Powell of Number 37 Belton Street, Long Acre, Coal Dealer Acknowledges &c. ten Pounds. Joseph Beasmore of Number 18 Regent Street, Kensington Square, Harp Maker Acknowledges &c. ten Pounds. UPON CONDITION That the said William Mertens do keep the Peace and be of good Behaviour towards our Sovereign Lord the King and all his Liege Subjects and especially towards William Greenfield for Six months Then this Recognizance to be void or else remain in full Force. TAKEN and acknowledged the fourteenth Day of March One Thousand Eight Hundred and Thirty two. |
The Times September 24th, 1825
(From the Thomson Gale online Index to the Times)
PURSUANT to Decree of the High Court of Chancery, made in a cause wherein George Sharp is the Plaintiff, and Martha Erat widow and others are Defendants, the CREDITORS of JACOB ERAT, late of Berners street. Oxford street, in the parish of St.Marylebone, in the county of Middlesex, harpmaker (who died in the month of March, 1821), are forthwith to come in and prove their debts before Francis Paul Stratford, esq. one of the Masters of the said Court, at his chambers in Southampton buildings, Chancery lane, London; or in default thereof they will be excluded the benefit of the said decree. C. SABINE, Plaintiff's solicitor, Carmarthen street, Bedford square |
The final settlement of the financial affairs of the late Jacob Erat appear to have continued to drag on until 1831, ten years after his death (see advertisement below)
.
The London Gazette March 4th, 1831
TO be peremptorily sold, pursuant to an Order of the High Court of Chancery, made in a cause of Sharp versus Erat, with the approbation of Francis Paul Stratford, Esq. one of the Masters of the said Court, at the Public-Sale-Room of the said Court, in Southampton-Buildings, Chancery-Lane, London, on Tuesday the 22d day of March 1831, in three lots; Sundry leasehold messuages and premises, situate in Berners-Street, Oxford-Street, and in Park Street, Camden-Town, and Perry-Street, Somers-Town, held for long terms of years, at ground rents, the property of Mr. Jacob Erat, deceased. The place of sale will shortly be advertised, when printed particulars may be had (gratis) at the said Master's Chambers, in Southampton-Buildings, aforesaid; of Mr. Sabine, Solicitor, 21, John Street, Bedford-Row; and of Mr. Hamilton, Solicitor, Berwick-Street, Soho. |
By the time of England and Wales Census for 1841, Wilhelm or William Mertens can be found, with his family, living in New Bond Street, St.George Hanover Square, Westminster. (HO 107/733/3 11). And has returned to his craft as a Harp Maker (rather than Grocer and Oilman above)
Name | Male | Female | Profession | Born in | Foreign |
Age | Age | same County | Parts |
| William Mertens | 45 | Harp Maker | F |
| Charlotte Mertens | 29 | Y |
| Edward Mertens | 20 | Carpenter App | Y |
| William Mertens | 12 | Y |
| Frederick Mertens | 8 | Y |
| Maria Mertens | 3 | Y |
| Caroline Mertens | 1 | Y |
| |
Charlotte Mertens his widow, re-married at St Pancras Church in the Parish of St Pancras in the County of Middlesex
When Married | Name and Surname | Age | Condition | Rank or Profession | Residence | Fathers Name and Surname | Rank or Profession of Father | |
December 14th 1846 | John Reeve | Full age | Batchelor | Sawyer | King St | John Reeve | Dead | |
Charlotte Mertens | Full age | Widow | D[itt]o | Robert Duke | Dead |
Witnesses : Richard Williams, Mary Hughes
I've also managed to trace to marriages of two of Christian Wilhelm Merten's daughters.
Christchurch in the Parish of St Marylebone in the County of Middlesex - Registration District Marylebone
When Married | Name and Surname | Age | Condition | Rank or Profession | Residence | Fathers Name and Surname | Rank or Profession of Father | |
June 11th 1842 | William Warner | Full Age | Widower | Engraver | Cunningham Place | William Warner | Ironmonger | |
Elizabeth Matilda Cross Mertens | Full Age | Spinster | Cunningham Place | Christian Wilhelm Mertens | Harp Maker |
Witnesses : Edward Cross, Matilda Elizabeth Cross Mertens
St Pancras Church in the Parish of St Pancras in the County of Middlesex
When Married | Name and Surname | Age | Condition | Rank or Profession | Residence | Fathers Name and Surname | Rank or Profession of Father | |
September 12th 1847 | Abraham Stimson | Full age | Widower | Shoemaker | King St | Abraham Stimson | Dead | |
Emma Mertens | Full age | Spinster | D[itt]o | Christian William Mertens | Dead |
Witnesses: John Reeve, Charlotte Reeve's X Mark
Elizabeth Warners Will from 1851 mentions, among others, Matilda Elizabeth Cross Mertens above
To date I've managed to locate 5 baptisms and two GRO Births of the children listed in the 1841 Census above
St. Mary Lambeth Baptisms
25th Mar. 1821 | Edward Willhelm s/o Christian Willhelm and Elizabeth Mertens of George Street, Harp Maker | |
23rd Feb. 1823 | Emma d/o Christian Wilhelm and Elizabeth Mertens of George Street, Harp Maker | |
12th Aug. 1832 | Frederick William s/o Christian William and Charlotte Mertens of George Street, Harp Maker | |
3rd Apr. 1836 | George Wilhelm, born 9th Nov. 1833, s/o Christian and Charlotte Mertens, of 12 �ton Buildings, Harp Smith | |
3rd Apr. 1836 | Charles Alfred, born 26th Oct. 1835, s/o Christian and Charlotte Mertens, of 12 �ton Buildings, Harp Smith |
Saint James Westminster, Sub-district Golden Square, Middlesex
When and where born | Name, if any | Sex | Name and surname of father | Name, surname and maiden surname of mother | Occupation of father | Signature, description and residence of informant | When registered | |
7th Nov. 1839 [at] No.15 King St. | Caroline Emma | Girl | Christian Willhelm Mertens | Charlotte Mertens formerly Duke | Harp Maker | Charlotte Mertens Mother No.15 King St, her mark x | 6th Dec 1839 | |
Saint Pancras, Sub-district Somers Town, Middlesex
When and where born | Name, if any | Sex | Name and surname of father | Name, surname and maiden surname of mother | Occupation of father | Signature, description and residence of informant | When registered | |
17th Dec 10 minutes past 11am the Morning at 12 Phoenix place | Victoria Maria | Girl | Christian Wilhelm Mertens | Charlotte Mertens formerly Duke | Harp Maker | the mark of x Charlotte Mertens Mother No.12 Pheonix place | 29th Dec [1837] |
The Mertens Family (from the 1881 Census Caterham Surrey)
William Mertens Head Age 51 House Painter Born Lambeth
Louise Mertens Wife Age 52 Born Marylebone
Charlotte Mertens Dau Age 23 Born St Pancras
Maria Mertens Dau Age 18 General Servant Born London
Florence Mertens Dau Age 15 Scholar Born St Pancras
Matilda Mertens Dau Age 11 Scholar Born St Pancras