[Illustration:  MRS. ORMOND G. SMITH’S TRELLIS ROOM AT CENTER ISLAND, NEW YORK]

Our outdoor trellis is at the end of the Villa Trianon garden, in line with the terrace where we take our meals.  This trellis was rebuilt many times before it satisfied me, but now it is my greatest joy.  The niches are planned to hold two old statues and several prim box trees.  I used very much the same constructive design on one of the walls of the Colony Club trellis room, but there a fountain has the place of honor.  Formal pedestals surmounted by gracefully curved urns, box trees, statues, marble benches, fountains—­all these belong to the formal outdoor trellis.

The trellis is primarily suitable for garden architecture, but it may be fitted to interior uses most skilfully.  Pictures of the trellis room in the Colony Club have been shown so often it is not necessary to repeat more than one of them.  The room is long and high, with a floor of large red tiles.  The walls and ceiling are covered with rough gray plaster, on which the green strips of wood are laid.  The wall space is entirely covered with the trellis design broken into ovals which hold lighting-fixtures—­grapes and leaves in cloudy glass and green enamel.  The long room leads up to the ivy-covered trellis of the fountain wall, a perfect background for the fountain, a bowl on the brim of which is poised a youthful figure, upheld by two dolphins.  The water spills over into a little pool, banked with evergreens.  Ivy has been planted in long boxes along the wall, and climbs to the ceiling, where the plaster is left bare, save for the trellised cornice and the central trellis medallion, from which is suspended an enchanting lantern made up of green wires and ivy leaves and little white flames of electric light.

The roof garden of the Colony Club is latticed in a simple design we all know.  This is lattice, not trellis, and in no way should be confounded with the trellis room on the entrance floor.  This white-painted lattice covers the wall space.  Growing vines are placed along the walls and clamber to the beams.  The glass ceiling is supported by white beams.  There are always blossoming flowers and singing birds in this room.  The effect is springlike and joyous on the bleakest winter day.  The room is heated by two huge stoves of green Majolica brought over from Germany when other heating systems failed.  Much of the furniture is covered with a grape-patterned chintz and a green and white striped linen.  The ceiling lights are hidden in huge bunches of pale green grapes.

I recently planned a most beautiful trellis room for a New York City house.  The room is long and narrow, with walls divided into panels by upright classic columns.  The lower wall space between the columns is covered with a simple green lattice, and the upper part is filled with little mirrors framed in narrow green moldings, arranged in a conventional design which follows the line of the trellis.  One end