I have no birth/baptism for Janet. I do have a copy of her death reg.
Deaths Dec 1863
Blackley Jennett Liverpool 8b 50
RD Liverpool - Sub-district St Martin - County Lancaster
No 458 - Third December 1863 94 New Hedley Street - F - 34 years - Wife of Thomas Blackley Iron Moulder Journeyman - Cancer 15 months Certified - Thomas Blackley present at death 94 New Hedley Street Liverpool - Third December 1863 - Henry Shaw Deputy Registrar