Ok, let's say we have six million cards to get through.
That's 6,000,000

We split them up and divide them between 100 volunteers
Each volunteer has 60,000 cards
Each volunteer flicks through the cards at a rate of say 1 every second.
Let's say the volunteer can work for an hour at that rate, and have a break for ten minutes. Let's say they start at nine o'clock, have just half an hour off for lunch, and they finish at 5 o'clock. That's six hours solid work.
Ok, so that would be 3,600 cards looked at per day.
So it would take 17 days to get through.
Lets add some weekends to that, it would take over three weeks to achieve.
So now the volunteers each have 400 cards with notes on the back. Let's say spend an hour transcribing each card that has been singled out, and scanning each one, and uploading the information to a webpage. That would be thirteen weeks to transcribe them.
So that would take in total sixteen weeks of working full days for one hundered volunteers. Adding a bit of slack to that, it's six months for people working non-stop.
It's a big task.
I've probably got my maths wrong somewhere, but it's late.
