[3] One was situated at the bottom of Knockmaroon Hill and the other was a half-mile upstream where the current Farmleigh Bridge now stands.

It is suspected that the ferry at this site was a private operation for the Guinness family as they owned land on the south bank of the river.

[3] It is understood the iron bridge eventually replaced the ferry and was probably built by the engineering department of the Guinness Brewery.

[4] Privately built by the Guinness family, it was also used by staff who lived on the south side of the river (by Palmerstown) as a short-cut to the grand house.

[5] The bridge (near the Angler's Rest pub) is long disused, with no remaining base or platform to carry traffic.