[4] The CB&PR directors decided that with increasing patronage to Cove, now renamed Queenstown, they wished to operate their own Steamship to connect with trains.

[5] After the Cork and Youghal Railway opened its branch to Queenstown on 10 March 1862 the competition from the direct route forced the CB&PR to reduce its combined rail/steam fares.

[8] The rival Citizen River Steamer Company was unable to meet liabilities in January 1890 and was wound up, the CB&PR acquiring the vessels for £1405 2s.

[11] The latter part of the nineteenth century had seen considerations given to extending the CP&BR to eliminate some steamship journeys and with the aim of creating greater residential development and commuter traffic.

[12] In the event construction difficulties and time overruns occurred particularly with the 1,500 feet (460 m) tunnel just north of Passage, the final cost being accounted as £200,093.

[14] The section between Cork and Blackrock was also converted to double track at the same time,[15] unique on an Irish narrow gauge railway.

[17] Rolling stock for the line consisted of four new narrow gauge locomotives by Neilson Reid in Glasgow and a number of bogie coaches.

For the first time the CB&PR showed an interest in freight with a number of open wagons, vans and cattle trucks being purchased also.

[18] The building of the extension occurred concurrently with serious competition from the Cork Electric Tramways and Lighting Company line operating to Balliatemple and then Blackrock having a negative effect on the commuter traffic in that area.

[19] The CB&PR achieved a net profit of £8,859 on receipts of £23,341 in 1904–5, with summer tourist traffic being very significant though the overall financial position remained strained by loans and Debenture Stock.

Crosshaven station was closed to civilians on security grounds[a] and non-essential travel was stopped impacting the CB&PR's tourist traffic.

Additional strains were placed by demands on the CB&PR's steamers to transport significant amounts of cargo for the military.

[27] After closure the line's steam locomotives were transferred to the Cavan and Leitrim Railway after refurbishment at either Rockferry, Cork or Inchicore Dublin Workshops.

[30][verification needed] Since the closing of the railway, the line has been paved over to serve as a recreational walkway, with lighting and benches put in place.

The bridge over the Douglas estuary, between Blackrock and Rochestown is still standing, although it had fallen into disrepair until the late 1990s when extensive repair work was completed.