Sounds to me like the old man was working much harder than he needed to. Why would he put down newspaper, then cover that with soil, when he could simply lay the potatoes on top of the soil, or even in a trench? I tuck each seed piece into the soil, then toss about 6" of loose hay or other mulch material over them. Keep adding mulch until it's at least 8" thick. It settles and decomposes over time. It's important to keep the mulch deep enough that the sunlight can't reach the tubers. But, even with all of the work you went to, you should have a good crop. Potatoes are heavy feeders, so you may need to take that into account.