East Mill, 9 Guthrie Street, Dundee

East Mill, located at 9 Guthrie Street in Dundee, is a tannery built in 1792 that was converted to flax spinning in 1799. The building was extended to the east in the 1820s to 1830s and completed by 1851. A fire barrier divides the three-storey mill into two ten-bay sections. The structure is primarily built of rubble, with some later harling applied.

The western section, dating from 1792, features altered windows from 1799. The ground floor is below street level due to the natural slope of the site. The first floor is harled, with most windows altered except for one in the west gable. The second floor has ten windows, all with nine-paned wooden-framed glazing. There are two windows in the west gable, one of which has an iron hook for a hoist, and a small window in the attic.

The eastern section is also three-storey, with the ground and first floors harled. The ground floor windows have been altered, but the first and second floors retain their original window pattern, including a larger first-floor window on the west side that lights the engine house. The east gable has three bays on the third floor, featuring two first-floor sash and case windows and fixed windows on the second floor, flanking central hoist doors under iron hooks. The gable is adorned with skewputts and a flat-topped finial. The north elevation is similar, although the first floor of the west section has been altered. The building has a slate roof with two fire barrier walls and a brick wallhead stack.

Inside the western section, there is a single row of Y-shaped cast-iron columns supporting two parallel wooden beams, dating from 1799. The engine house features fluted cast-iron columns with Egyptian Lotus capitals at the base. The north wall is supported by square stone pillars and heavy cast-iron columns, which were inserted between 1846 and 1851. The first floor has been altered, while the second floor remains as originally built, including a recess for "the Jakes," an earth closet installed by Brown in 1819 in the northeast corner. The central engine house retains a stone and wooden platform and casing for the iron beam of the engine, which was installed by Boutton and Watt in 1809, along with a plaster corniced ceiling. The tie-beam roof was originally plastered. In the eastern section, the ground floor has been altered, while the first and second floors feature flanged iron columns and wooden beams.