[3] Bergin, who was by profession a civil engineer, was to join the Dublin and Kingstown Railway (D&KR) in 1832, replacing James Pim as company secretary.
[4][5] Lyons notes Pim and Bergin as "two of the most valuable engines the D&KR possessed, although other individuals also played an important part.
[7] Thomas notes the D&KR Chief Clerk (aka Bergin[a][9]) was sent to the Liverpool and Manchester Railway (L&MR)[b] in June 1833.
[9] Dawson notes Bergin observed the sprung buffer / connection system used on the L&MR and determined to develop his own design for the D&KR.
[10] On 16 December 1834 Bergin was to place advertisements in the Dublin newspapers as Clerk of the Company proclaiming the public opening of the D&KR with an hourly service from 9am to 4pm inclusive from Westland-Row to Blackrock and Kingstown.