Chris - I've taken the liberty to "polish" the verses you posted
THE FOGGY DEW
[1] As down the glen one Easter morn, to a city fair rode I. 'Twas Ireland's lines of marching men in squadrons passed me by. No pipe did hum and no battle drum did sound its dread tattoo. But the Angelus bell o'er the Liffey's swell rang out in the foggy dew.
["city fair" is a common colloquial pseudonym for Dublin.]
[2] Right proudly high over Dublin town they flung out their flag of war. 'Twas better to die 'neath an Irish sky than at Suvla or Sud el Bar. And from the plains of Royal Meath, strong men came hurrying through, while Britannia's sons with their long range guns sailed in through the foggy dew.
[Suvla and Sud el Bar are references to battles where Irishmen fought under England's flag]
[3] Oh, the night fell black and the rifles' crack, made perfidious Albion reel. 'Mid the leaden hail seven tongues of flame shone o'er those lines of steel. By each shinning blade a prayer was said, that to Ireland her sons be true, and when morning broke still the war flag shook out its folds in the foggy dew.
[4]'Twas England bade our wild geese go, that small nations might be free. But their lonely graves are by Suvla's waves or the fringe of the great North Sea. Oh had they died by Pearse's side, or fought with Valera true, their graves we would keep where the Fenians sleep, 'neath the shroud of the foggy dew.
[5] Oh the bravest fell, and the requiem bell rang out mournfully and clear, for those who died that Eastertide, in the springing of the year. All the world did gaze in deep amaze at those fearless men but few, who bore the fight that freedom's light might shine through the foggy dew.
[6] As up the glen I rode again, my heart with grief was sore. For I parted then with those valiant men whom I never shall see more. As to and fro in my dreams I go, I will kneel and say a prayer for you, for slavery fled, O Glorious dead, when you fell in the foggy dew.
I have added the other two verses. There may be more which have "evolved" since the song was originally published. It is attributed to a priest, P. O'Neill, and is a tribute to those who fought in the Easter Rebellion of 1916.