Richard records in such minute detail this biosphere, its bounty, in his synoptic book. Fern-beds of Hampshire County recolonize this rarely trodden trail winding to Hamlen Brook.      Come walk with me, and take a look.      A collapsed, camouflaged pup tent      marks the damp nights youngsters spent      fearing this little wilderness, grandson and granddaughter      swapping ghost stories, I’d guess. But suddenly the rush of laughing water that never deigned to flow in all my drought year visits long ago: I stand athwart this mossy, rocky bed, revolving in my sunrise revery      quatrains I hold in…