Thanks for the upload Gwyn. It's interesting to see this map for the snapshot of Bangor in the late 1940's. It says it was revised in 1963, but doesn't incude the major hosebuilding projects in the fifties for Maesgeirchen (labelled Tyddyn Llwydyn on this map after the house) or Coed Mawr.
It does show the rows of prefabs to the west of the thirties build (concentric circles) of Maesgeirchen.

Anyway as a child I used to wander down to Port Penrhyn. After the line closed, I remember wandering in to the old engine shed and loking at rolled up loco plans left on a work bench.

I just left them there, who knows what happened to them!

I was going to say the same thing - thank you Gwyn, that was interesting to have a look at.

I never realised that Menai Bridge station was quite so close to, er, Menai Bridge - I'd always thought it was about halfway towards the Britannia Bridge 😞

Similarly, it's surprising (in a way) how much Bangor has grown, especially the expansion of Maesgeirchen and along Caernarfon Road.

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Vanoord said

Similarly, it's surprising (in a way) how much Bangor has grown, especially the expansion of Maesgeirchen and along Caernarfon Road.

Yes, my Great grandfather bought Cae Mab Adda farm, which was still owned by my cousin, when sold off to build Currys etc.
I've got some photos from the thirties of this area, still farmland.

Thank you for your comments. I'm pleased that you found the map interesting.
I'm sorry that it is upside down, as are some other maps that I've submitted. I don't want to damage/re-fold the maps in order to scan them the "correct" way round and I am unable to find a way to correctly orientate them prior to submission.
Bangor, given its geographical location, has had to expand along the valley of the Adda. Expansion is now taking place on a new site at Llandegai. Maesgeirchen was (some might say it still is) a good example of how not to carry out "social housing".
Menai Bridge railway station and its environs is a very interesting! It has little to do with mine and quarry exploration and I trust that this will not give offence!
When the Chester and Holyhead Railway Company built the line in the 1840's they had great plans to develop the area that is now the Treborth Botanical Gardens. This was to be Brittania Park, a great Victorian extravaganza combining housing, extensive glasshouses and landscaped gardens. Sir Joseph Paxton was brought in to plan and manage the landscape groundworks.
The whole thing floundered because of lack of money, although features such as the Cascade and Lime Avenue are extant.