This is Kevin Burke’s version from If the Cap Fits.
If I remember rightly, Kevin Burke does not repeat the 2nd part - it’s an AAB tune (see also discussion on 3-part single reels).
Under Dillon Brown entry in Fiddler’s companion it is listed as an AABB reel:
"DILLON BROWN’S FANCY  (Diolún de Brún). AKA - "Dillon Brown." AKA and see "Laington’s Reel," "Langton’s Favorite." Irish, Reel. A Major. Standard. AABB.""
“Dillon Brown’s Fancy” ~ back from the future
Submitted on July 3rd 2006 by olguin.
T: Dillon Brown’s Fancy
R: reel (double = 32 bars as shown below)
K: A Major
AFEF A3 e | fece fgaf | e2 ce afec | BAFA BdcB |
AFEF A2 ce | fece fgaf | (3efe ce afec | BdcB A2 |
AFEF A3 e | fecf fgaf | ec=c^c afec | afec BdcB |
AFEF A=c^ce | fece faaf | (3efe ce afec | BcdB A2 ||
|: ed |
ceAe ceAc | BE (3EFE EGBd | cAAG Acec | BABc dcBd |
(3cdc Ac (3cdc Ac | B2 GB EBGB | ABce fefa |1 ecc=c ^cdcB :|
2 AFEF A2 ||
Dillon Brown’s Fancy, aka Laington’s Reel 
This version was Transcribed by Paul de Grae. I first heard this tune on the cd entitled High Clouds, featuring the Greenfield Dance Band. This tune was part of a set on track 2 as follows: The Silver Spire, The Ships are a Sailing, Dillon Brown’s Fancy.
# Posted on July 3rd 2006 by olguin
It seems that Cape Breton fiddlers normally call this reel "Dillon Brown’s" or "Dillon Brown’s Fancy." Another tune with the same title in G was recetly posted: https://thesession.org/tunes/6863
X: 3 is Paddy Killoran’s 1939 cylinder recording under the title "Langton’s Favourite".
This setting comes from Irish Traditional Fiddle Music, by Perron-Miller, where it appears as "Dillon Brown’s Fancy". A delightful part B in particular. I omitted the repeat of part B which appears in the publication as I have only ever heard this tune played AAB. A variation for bars 5/6 of part B is given as |ceAe ceAc|B2 GB EBGB|.