Probably the biggest influence on folk music in the USA.

There is a Smithsonian Folkways Album set which I thoroughly recommend called "Anthology of American Folk Music". The original had a profound influence on all sorts of people.

Originally done in 1952 I love the original notes - there is a repro in the modern version. Summary of Child 274 for example reads: "Wife's logic fails to explain strange bedfellow to drunkard".

There is plenty about Harry on the web.

One here for example.

I am eternally grateful to Peregrina on Mudcat for introducing me to Harry.