Madam, - I beg to differ with Sean Deegan's assertion (July 3rd) that Dunsink Observatory is located in Finglas and not Castleknock. Firstly, the Observatory's postal address is Dublin 15, the same postal district as Castleknock. Finglas is in Dublin 11. Secondly, Finglas is in Dublin City Council's area; Dunsink and Castleknock are both in Fingal. Lastly, the observatory is no longer accessible from Finglas, as Dunsink Lane is now physically closed off at the Finglas end. Access is from the Castleknock roundabout of the N3 only. I rest my case. - Yours, etc,
BARRY PICKUP, Boulevard North, Bayside, Dublin 13.