The last but one Arethusa was the Peking, one of the R.F Laeisz's Flying P-Liner four-masted barques, built in 1911, and acquired after 1918 as war reparations.

In recent times extra housing has been built behind this street, exploiting the land exposed by quarrying the steep hillside that leads to Hoo Common.

Medway Yacht Club, which was founded in 1880,[4] purchased land in Lower Upnor in 1948, now comprising approximately 14 acres (57,000 m2).

Upper Upnor is on the Chatham Reach of the River Medway, directly opposite St Mary's Creek.

Like other parts of Frindsbury, chalk has been extracted, high quality moulding sand has been taken from a pit near the Church, and William Burgess Little built 25 five barges at his yard between 1843 and 1871.

[8] Upnor Castle was built as an artillery fort between 1559 and 1567 in order to protect Chatham Dockyard and the associated naval anchorage.

It was called into action in June 1667 when the Dutch Navy conducted a raid on the ships moored in the river; the castle proved ineffective in repelling the attack and it was decommissioned soon afterwards.

[9] Upnor Castle served as a gunpowder magazine for the Board of Ordnance from 1668, providing powder for the defences of Chatham Dockyard and for the fleet based in the Nore.

[13] The Admiralty therefore embarked on building a new inland depot, next to Chattenden, at Lodge Hill; opening in 1898, it dealt principally with cordite.

The site was extended further to the north in the early 1900s to allow construction of a much larger store for filled shells and another for mines.

At the same time a complex of buildings for filling shells with powder (and later also with trotyl and amatol) were added behind the original 'A' and 'B' magazines.

[11] The three sites, Upnor, Lodge Hill and Chattenden, were active as Royal Naval Armaments Depots until the mid-1960s.

This line was used to supply armaments from Chattenden, the Lodge Hill Ammunition Depot and the standard gauge at Sharnal Street, to the warships and the Upnor Magazine.