Nat's entry for 15th March was pretty accurate for Mrs. S's address according to the 1851 census.
"While there fell into conversation with an elderly lady who came on the same errand, and from her learnt that there is now living an old lady, a descendant and the last remaining of that great man, who is also a member of a dissenting chapel in King’s Head Court, Shoreditch, one end whereof leads to the High Street, and the other to Cumberland Street, Curtain Road, and she liveth somewhere in John’s Row, Clerkenwell or St Luke’s. This same lady has had tea with her twice, and she the said descendent by name Skillicker has now in her possession a painting of him."
Perhaps the Barnsbury Park house to which Nat followed her was just a regular Sunday visit to someone on her way home. The entry also refers to the portrait to which Mrs. S liked to compare herself.
Didy