On the Market: From consulate to convent, 3 historic New Orleans houses on the market

KEY TAKEAWAYS: Xiques Mansion (521 Dauphine St.) in-built 1852, linked to Spanish consulate homicide, priced at $3.9M 2027 Carondelet St. dwelling of steamboat captain Thomas Leathers, restored with fashionable facilities, listed for $2.5M 515 Ursulines Ave., a part of unique…