Call it country livin’ in the city. Hitting the market for the first time in nearly 40 years, 34 Bergen Street is one of Cobble Hill’s treasured wood-frame houses — a six-bedroom, 3.5-bath legal two-family that dates to 1842 and still serves front-porch charm with legit Brooklyn convenience. Listed at $4,995,000 with Christopher Mohr, Lindsay Barton Barrett, and Taylor Schultz at Douglas...