18-10: Three of my books - and some basic notes that were used to write them.
A card index of potteries in England, 1660 to 1815 for my PhD. Sheets of notes extracted from probate inventories used in my research (and book) on consumer behaviour from 1660 to 1760.
I worked with paper - but have 'put them on a database' since - quite small databases actually.
I am going to make a metaphorical (ie not a real bonfire) bonfire of the papers - as I do not expect to look at them again (I have not done so in the last 15 years!). Part of clearing out my possessions.