A great one-page article appears in this month's National Geographic Explorer about a trip to Jamaica where he visits a tiny organic coffee farm.  It's some short, colorful narrative, which includes this quote from Dennis:

"All de days of me life, I’m farming it an’ preparing it de way my grandfather did, straight from de 17th century. No machinery, no chemicals; everyt’ing got to be by hand and natural." Even the grinding method is rudimentary; Hampton poured the beans into a hollowed-out log, then crushed them with a mortar. When he came over with a steaming cup, I lifted it and experienced a tremendous wave of round, mellow flavor. This was some amazing coffee.

James Dennis is also mentioned in this article about Jamaican Coffee growers.