Thank you, m'lud.
On behalf of my client, Mr. Holman, I would like to submit that he has done a superb and accurate job here, and one with which this court may not reasonably find fault. Thus, I submit that the jury must find him not guilty of any wrongdoing..........
Seriously, you've nailed it. From observation of only two very tiny samples of original brown paint that I am aware of, that's perfect. You're going for a slightly older look; gold lining up to approximately 1910, with pale yellow gradually replacing it until the all-over very dark maroon of 1918.
I'm not 100% sure that the "VR" logo was used by the MGWR - some companies here used it and others didn't! It probably depended on the political affiliations of the relevant managements, and would possibly have been influenced by the clientele and general public to be found in the vicinity! If you've evidence of this, fair enough; I'm just unaware of it. I have seen a pic of a coach in blue and white (1902-5) with what appears to be some sort of intertwined letters on the mail coach, but this would have been Edwardian rather than Victorian, as that livery only appeared in 1902. But other mail vehicles don't seem to show anything like this - but it possible I just haven't noticed it.
In any event, a brake third would not have had anything like that - only specifically dedicated mail vans if anything. In Belmullet, mail bags would have been just thrown in the van of the brake coach.
Excellent job, and that coach build is superb, your carriages are perfect companions for the loco. A train like this could have left Belmullet with just those two coaches, picked up two more at Westport, another at Claremorris, and off we go to Athlone, where our D16 remains, and its collection of carriages join the up Galway - Broadstone Mail.
The make-up of a mixed train, as at Achill in the illustration you refer to, was ALWAYS in this order:
Loco
Vacuum braked stock (usually coaches, with passenger (vacuum) brake vehicle like yours last, but it COULD be ahead, maybe right behind the loco); then -
Loose coupled stock
Goods brake at the end. The only way you'd have a trailing truck without a goods brake would be if it was fitted, or (unofficially) maybe only one.
So, when your train leaves, if it's passenger / mail only, the two carriages above are enough. If it's a "mixed mail", you'll have your two coaches (the brake will be a brake third and the other a 1st / 3rd or 1st / 2nd), and then any wagons, and at the end a goods brake to control them.
As an aside, this is why it is essential for any modeller to have brake vehicles on EVERY train pre-approx-1970, no matter what it is, or where it is. So, as I've often said, we need the tin vans, goods brakes, and full brake carriages for steam days.