The main reason the Underground or ‘Tube’ tunnels follow the roadways is that the government had to compensate property owners if they tunnelled beneath their holdings, but to dig beneath roads cost them nothing.
In 1866, there was a financial crisis in the City of London caused by the collapse of the Overend, Gurney and Company, the ‘banker’s bank’, with debts at the time of more than 11 million, and work on the pneumatic railways was forced to pause. However, a ⅜ mile pneumatic tube had been constructed at vast expense. It began again two years later, and was finally completed in 1869, stretching to St Martin’s le Grand, and cars full of mail could then travel from the General Post Office to Newgate Street in under 17 minutes, reaching speeds of up to 60mph.
Unfortunately, atmospheric railways are notoriously unreliable, and cars full of parcels were continually stuck in the tunnels, so by 1874, the Post Office abandoned the use of the tunnel running west-east beneath the north end of Chancery Lane. It did not, however, stay abandoned for long.
Key to the construction of the pneumatic railway, already known in 1864 as ‘the tube’, was that telegraphic wires were laid down at the same time, beginning December 1864. In addition to this, in 1838, the new Public Record Office had been created, ostensibly fronting onto Chancery Lane, but in fact a vast complex that took up acres of land on the east side of the street, stretching all the way to Fetter Lane. It replaced the old Fetter Lane record office, which had incorporated the church or chapel of the Rolls, and the frontage visible now (as Kings College University campus) was built in 1851-1858 by James Pennethorne. Like the telegraphic wires, the Record Office would play an integral part in the genesis of the Chancery Lane Safe Deposit Company in years to come.
Upon the closure of the pneumatic railway, a group of enterprising City of London businessmen approached the London Pneumatic Despatch Company to purchase the stretch of tunnel between Holborn and Hatton Garden with the intention of creating safe storage in the form of safety deposit boxes and strong rooms. This was a considerable undertaking, and it took until the 7 May 1885 for the Chancery Lane Safe Deposit Company to open for business at 61 & 62 Chancery Lane. leasing safe deposit boxes and strong rooms for the ‘Safekeeping of Plate, Jewels, Bonds &c.’ The address was 61 & 62 Chancery Lane, situated on the east side of the historic London street, near the busy thoroughfare of High Holborn, advertised ‘telephone rooms’ for the use of renters as one of the main attractions.