A hanging corner cabinet with a 'swan neck' pediment top and astragal glazing, dating to the last quarter of the 1700s. An 'astragal' is a moulding or fillet profile composed of a half-round surface surrounded by two flat planes. It used to be employed as a framing device on furniture and woodwork.
Corner cabinets were fashionable and very common between 1760 and 1830. This particular example did not belong to John Wesley, but it is quite likely that one would have been in Wesley's house.