MATTHEW DICKERSON It was almost 20 years ago that my good friend David O’Hara and I first fished together on Maine’s Androscoggin River. Beginning just below the confluence with the Wild River in the village of Gilead near the New Hampshire border, Dave and I and Dave’s young son Michael canoed and fished our way six miles down the Androscoggin to a takeout in West Bethel. High flows following a week of rain in the northern Appalachians made for…