Wellclose Prison, also known as Neptune Street Prison, was located off Wellclose Square near to the Tower of London. The 18th-century small prison was run on a commercial basis and the majority of inmates were insolvent debtors who were either imprisoned until they could repay their debts or were awaiting transfer to Newgate Prison. The prison was below a public tavern which was connected to a courthouse, where the tavern’s landlord acted as gaoler. By the 1790s, the prison was empty and in a state of disrepair. The prison was finally closed in the 19th century and the building it was housed within was turned into a lodging house. When the building was demolished in 1911, two cells from the prison were dismantled and transferred to the London Museum at Kensington Palace and elements of both cells can now be found on display in the Museum of London. Prisoners in the cells were known to scratch and carve their names and initials or write messages or draw pictures onto the walls of the cells and many of these marks can still be seen today.