Whose mansion was the only palace in town?

The Widow Douglass owned the only palace in town.

The crowd filed up the aisles: the aged and needy postmaster, who had seen better days; the mayor and his wife—for they had a mayor there, among other unnecessaries; the justice of the peace; the widow Douglass, fair, smart, and forty, a generous, good-hearted soul and well-to-do, her hill mansion the only palace in the town, and the most hospitable and much the most lavish in the matter of festivities that St. Petersburg could boast; the bent and venerable Major and Mrs. Ward; lawyer Riverson, the new notable from a distance; next the belle of the village, followed by a troop of lawn-clad and ribbon-decked young heart-breakers; then all the young clerks in town in a body—for they had stood in the vestibule sucking their cane-heads, a circling wall of oiled and simpering admirers, till the last girl had run their gantlet; and last of all came the Model Boy, Willie Mufferson, taking as heedful care of his mother as if she were cut glass.