Note:  Do not rely on this information. It is very old.

Circular Notes

Circular Notes are a kind of bank-notes personal to the bearer, and are supplied by bankers to travellers with a list of foreign bankers who may be asked and expected to cash them. They are generally accompanied by a letter of identification on which the traveller has signed his name, and foreign bankers may ask for his signature for the sake of comparing it with that appearing upon the letter, and so obtaining greater security of identity.