In San Francisco in the late 1970s you could cover the entire modern art gallery scene, both commercial galleries and temporary exhibitions in museums or other public institutions, between a leisurely Saturday breakfast in Sausalito on the far side of Golden Gate Bridge - eggs Benedict and coffee perhaps - and a late lunch in the centre. Anyone who lived in London in the 1930s could have done something similar.
Have a look at the current ten-pound note. 'I promise to pay the bearer on demand the sum of ten pounds,' it says. The 'I' who is speaking appends her signature. She is someone called Merlyn Lowther. She describes herself as Chief Cashier, and she signs, as the note states, for the Governors and Company of the Bank of England.
This note strikes me as an interesting and important example of how trust works.