Reply To: rebuilding of the Custom House after 1921 fire
This is I believe also covered fairly well in the hard to find book about James Gandon, which a library should turn up for you on inter library loan. My copy is at home so I cannot give you more detail and it is a while since I looked at it.
There were very substantial changes to the design, as Mr Hickey has said. So when you view from the Gardiner St side, dont blame Mr Gandon.