Derrymore Hortus Lodge, 45 Derrymore Road, Bessbrook, Co. Armagh, BT35 7DN

Derrymore Hortus Lodge is a one-and-a-half-storey, three-bay former gardener's house built in approximately 1881 to the designs of an unknown architect. It stands at 45 Derrymore Road, Bessbrook, County Armagh, at the east entrance to Derrymore House, and is arranged on a T-plan facing northeast towards Derrymore Road. The building has group value with Derrymore House and with the large walled garden attached to its rear.

The house is constructed from random-coursed, rock-faced local Newry Granodiorite stone, with stepped buff brick dressings to the jambs, square-headed gauged-brick window openings, and stone cills. The roof is pitched natural slate with angled black clay ridge tiles. Eaves to the front elevation project heavily on five moulded timber brackets, with a painted timber fascia and soffit; the gables have dentilated timber bargeboards. Two rectangular-section red brick chimneys rise from the main block — one to the northwest carrying two terracotta clay pots, one to the southeast (now rendered) — and a tall rendered chimney rises from the rear return. Rainwater goods are generally cast iron, with ogee guttering discharging to circular-section downpipes.

The front northeast-facing elevation is symmetrical. A projecting monopitched-roof porch occupies the central bay, flanked on each side by double-hung 2/2 sliding timber sash windows with horns and reduced-height top sashes. The porch has three-quarter-height sidelights flanking a painted timber door with multiple glazed sections. The porch walling is finished in smooth cement render with buff brick quoins and a painted dentilated timber bargeboard to its cheeks. The garden in front of the principal elevation is set to lawn with some mature trees and shrubs, and is enclosed along Derrymore Road to the northeast by a random-coursed rock-faced stone wall with random stone coping and hedging, to the southwest by the walled garden, and to the southeast by a gravelled lane leading from Derrymore Road to Derrymore House. A set of painted metal scrollwork gates hung on slim posts at the southeast open onto a gravelled drive leading from the access road to the front of the dwelling.

To the northwest, set back from the main front elevation, is a single-storey flat-roofed extension block finished in painted roughcast cement render, with a three-part timber casement window and a felt roof finish. An enclosed yard and flush outbuildings are attached to its northwest side, also in painted roughcast cement render. Separate painted sheeted timber doors on the front elevation lead to the enclosed yard and the attached outbuilding. The attached outbuilding has a pitched corrugated metal roof recessed behind a raised verge with angled coping to the front.

The southeast elevation faces towards the access road to Derrymore House. It consists of a gabled block with a 1/1 sliding timber sash window to the centre of the gable at first-floor level and a larger 2/2 sash window with a reduced-height top sash to the northeast at ground-floor level. The gable has a rendered chimney at its apex and a dentilated bargeboard to the projecting eaves. A rendered section of tall stone-built garden wall projects to the southeast from the southwest end of the gabled block before turning ninety degrees towards the southwest. The elevation is generally finished in smooth cement render. A one-and-a-half-storey pitched-roof rear return extends to the southwest inside the walled garden, with a tall rendered chimney rising from near its side wall.

The southwest elevation faces southeast into the large walled garden associated with Derrymore House. It consists of a gabled two-storey smooth-rendered rear return projecting from the centre of the elevation, with a wide timber casement window at ground-floor level and a smaller similar window at first-floor level.

The northwest elevation consists of a one-and-a-half-storey block retaining the original stone walling with two flush red brick flues, a red brick chimney at the apex, a dentilated timber bargeboard, and a 1/1 timber sash window to the centre of the gable at first-floor level. This elevation is fronted by the flat-roofed extension with its enclosed yard and attached outbuilding to the northwest. The flat-roofed extension has a panelled painted timber door with a glazed top half to the southwest, opening into an enclosed concrete rear yard finished internally in painted smooth cement render. The outbuilding attached to the northwest has a four-part timber casement window to its northwest end and a painted sheeted timber door to the southeast opening into the yard.

The building's setting is noteworthy. A private gravelled lane leads southwest from Derrymore Road to Derrymore House via a set of painted cast iron gates hung on circular-section stone-built pillars. Hortus Lodge stands in private grounds to the northwest of this access lane. To the southeast of the lane lies Rose Cottage, a similar-sized lodge also associated with Derrymore House but with significant differences in detailing. A high rectangular-plan random rubble stone wall, brought to courses, encloses the garden to the southwest of Hortus Lodge. The walled garden is accessed through a semicircular-headed opening on the southeast side containing double timber doors, with a further small door in the northeast wall. Modern greenhouses within the walled garden and the boundary walling remain mostly intact.

Internally, the building's character is somewhat reduced by modern finishes. The exterior is also compromised by the rendered extension and some external cement render to parts of the original stonework.

Historically, the building has considerable significance. Derrymore House was originally constructed in approximately 1776 for Isaac Corry, representative of Newry in the Irish House of Commons. In 1859 the Derrymore estate was acquired by John Grubb Richardson (1813–1891), a linen merchant from Lambeg who had effectively founded the village of Bessbrook in 1845 when he purchased one of the derelict mills in the area and began building housing for his factory workers. Richardson made Derrymore his personal residence; his family also resided at Mount Caulfield House on the Green Road. Hortus Lodge was first recorded in the Annual Revisions in 1881, constructed as a residence for the estate's gardener at the southeast corner of Derrymore's ornamental walled garden, which had itself been depicted on Ordnance Survey maps from as early as the first edition of 1834–35. The gardener's house appeared as a simple rectangular-plan building on the third edition Ordnance Survey map of 1906. It was not recorded separately from Derrymore House in the valuation sources until 1913, when the Annual Revisions set its total rateable value at £3 and 10 shillings, at which time it was occupied by a Mr Thomas Taylor. Taylor continued in residence until at least the 1930s. In 1952 Derrymore House and its outbuildings were sold by the Richardson estate to the National Trust, which has maintained the late 18th-century house as a museum. Under the Second General Revaluation of 1956–72, the lodge — recorded as Rose Cottage in the valuation source — was occupied by a Mr David H. Paul and valued at £15 and 10 shillings. The current rear return was not added until after 1956, as the building was still shown with a simple rectangular plan on the fifth edition Ordnance Survey map of that year. Hortus Lodge was listed in 1988. The architectural historian J. A. K. Dean, writing in 1994, described the gate lodges of Derrymore in the following terms: "All lodges to this delightful seat of the Corry family disappointingly non-descript." At the time of the Second Survey field inspection, Hortus Lodge continued to be occupied as a private dwelling.