Echo (Harbour Provisioners)
From Fallen London Wiki
"Echoes are the currency of the Bazaar; and, thus, the currency of London." Note: this is the currency of Sunless Sea. It is demanded for Fuel and Supplies on the Bazaar of Iron Republic Streets.
This item can no longer be obtained. For details, see Sunless Sea.
This item has no documented sources. [Add it as a reward to some actions if you know some!]
This item has no documented uses.
Wiki note: Could be exchanged for 
Fuel or 
Supplies at the now retired shop 
Harbour Provisioners
