ARCHITECT/ENGINEER/DESIGNER: Henry Charles SWAN (c.1856-1931) Henry Charles Swan is believed to have settled in New Zealand during the late 1890s. Originally from Newcastle, Swan brought land at Henderson late in 1898 and by 1905 had moved from Devonport to live there permanently. A solicitor by profession, Swan appears to have had no experience in architecture or building, although writer Paul Titchener suggests he had a series of labouring jobs in Canada prior to coming to New Zealand. There is suggestion from other quarters that Swan enjoyed bricklaying and built the arch purely as a hobby. The construction of both the arch and a nearby cellar suggest a high degree of skill and proficiency. ARCHITECTURAL DESCRIPTION: Swan's arch most closely resembles a stilted arch. The springing line is raised above the impost level which coincides with a splayed plinth. The plinth, clearly shown on early photographs, was originally just above high water mark but is now approximately 500mm below existing ground level. A beaded pointing has been used on the face of the arch at the extrados. All other brickwork on the facade has flush pointing. Detailing has been accomplished by means of shaped bricks, plastered, although the coping of the wing wall has a brick aggregate base. The configuration of the arch abutments and the wing walls gives the appearance of pilasters on the "public", northwestern side. The "pilasters" have simple plaster architrave and cornice with plain brick friezes. The cornice also extends along the parapet. The projecting, capped keystone at the crown, as well as the skewbacks at the ends of the arch face, have a plaster finish while the voussoirs are brick. Plaster utilised on the wing wall coping which also extends a short distance down the wall, has a pointed, ashlar marking. The top of the plinth and parapet cornice are marked in a similar manner. A set of six concrete steps originally provided access from water level to the stream bank at the end of the surviving wing wall. The depth of the arch is now somewhat reduced, evidenced by the ragged end of the arch soffit extending beyond the back surface of the arch haunches and spandrel. The absence of one of the wing walls suggests that it may never have been completed to sufficient height for a coping, leaving it exposed to weather, thus assisting deterioration. In the absence of substantive documentary evidence, the purpose for which the structure was built remains unknown. Notes on the back of photos from the Allely family describe it as brickwork erected as a hobby by Mr Swan, and also refer to it as a bridge. The arch has elements in common with older brick arch bridges; however, it stands comparatively taller and narrower, stressing the vertical rather than the horizontal aspect of its facade. The arch also invites comparison with the tunnel portals found on canals and railways in Britain. Arches also have had a place as features and entryways in gardens of grand scale. Whether by accident or design the arch suggests a facade, perhaps in the tradition of certain follies built in eighteenth and early nineteenth century Britain. Follies were often built for surprise, at secluded locations. Swan's arch lost in its bush setting, has always had the capacity to surprise, isolated for view as it originally was from Edmonton Road and from the small boats on Henderson Creek. MODIFICATION: Barring some deterioration the result of time, the structure is as built by Swan. The western wing wall is missing as are the concrete steps in the vicinity of the remaining wing wall. Changes in ground level occurring as the result of the construction of Central Park Drive, mask the full extent of the arch and its plinth. Now standing just under three metres high the arch was probably over four metres originally.