I can’t see any Lars or Lawrence Johnsons on the 1861-1881 censuses that look hopeful, so probably from here the Johnson line has to be tracked in Sweden.
It is however possible to follow the Curle line from the 1861-1891 censuses
1861 census RG9 288 folio 12 1 John’s Limehouse Middlesex
John Curle 41 Leystone, Essex, Head Married Ship’s Carpenter
Sarah Curle 33 Poplar, Middlesex, Wife Married
Sarah A Curle 12 Poplar, Middlesex, Daughter
Edward Curle 10 Poplar, Middlesex, Son
Walter J Curle 8 Poplar, Middlesex, Son
Mary A Curle 6 Limehouse, Middlesex, Daughter
Henry W Curle 1 Poplar, Middlesex, Son
1871 census RG10 575 folio 20 5 Broomfield Street Bromley St Leonard London
Sarah Curle 43 Poplar, Middlesex, Head Married Husband at Sea
Sarah Curle 20 Poplar, Middlesex, Daughter
Edward Curle 19 Poplar, Middlesex, Son
Walter Curle 16 Poplar, Middlesex, Son
James Curle 12 Limehouse, Middlesex, Son
Henry Curle 10 Poplar, Middlesex, Son
John Curle 6 Limehouse, Middlesex, Son
Fredrick Curle 4 Limehouse, Middlesex, Son
Jane Curle 2 Bromley, Middlesex, Daughter
1881 census RG11 499 folio 133 13A Ellesmere Street, Bromley St Leonard, London
Sarah Curle 53 Poplar, Middlesex, Head Widow
Henry Curle 20 Poplar, Middlesex, Son Labourer out of work
James Curle 17 Limehouse, Middlesex, Son Labourer out of work
John Curle 15 Limehouse, Middlesex, Son Labourer out of work
Jane Curle 13 Bromley, Middlesex, Daughter Servant
1891 census RG12 324 folio 32 9 Johnsons Building Bromley St Leonard London
Curle, Sarah 66 Milwall, London, Head Widow Nurse
Curle, James 28 Limehouse, London, Son Labourer General
Curle, John 26 Limehouse, London, Son Labourer General
Shawn, Gertrude 18 Poplar, London, Visitor, Machinist
Deaths Jun 1879
Curle John Edward 53 Poplar 1c 474
To prove Sarah’s death you really need to find either John and Sarah’s marriage (doesn’t seem to be on FreeBMD) or purchase one of the children’s birth certificates to see if her full name was sarah Hannah.
Deaths Jun 1901
Curle Sarah Hannah 78 Poplar 1c 311
Regards
Valda