The dilemma

Petra says the fountain was paid for by the washerwomen's fund, coin by coin, in the year of the flood. Twelve people go quiet in the good way. The plaque an arm's length from your hand credits one family by name and does not mention any washerwomen at all. It is newer stone than the basin. Your friend turns round. 'Is that true, {{NAME}}? You grew up here.'

Your options

1. Read the plaque out. It says something else.
2. Say you do not know, and ask Petra later.
3. You are still working out what to say when the group moves on.