From a careful study of Eastern records and Sabaism, the author is led to take up the position that the round towers were constructed by early Indian colonists of Ireland (the Tuath-de-danaans), in honour of ” the fructifying principle of nature,” of which the sun and moon are representative.
…
The duration of Tuath-de-danaan supremacy may have been some six centuries, dating from the first battle of Moytura, in B.C. 1202, to the second battle, in or about B.C. 600.
Introduction by W. H. C. – London – 1897
The Round Towers of Ireland – Henry O’Brien – 1898
https://archive.org/details/roundtowersirel00obrgoog
See: https://malagabay.wordpress.com/2016/03/04/henry-obrien-and-the-round-towers/
…
The duration of Tuath-de-danaan supremacy may have been some six centuries, dating from the first battle of Moytura, in B.C. 1202, to the second battle, in or about B.C. 600.
Introduction by W. H. C. – London – 1897
The Round Towers of Ireland – Henry O’Brien – 1898
https://archive.org/details/roundtowersirel00obrgoog
See: https://malagabay.wordpress.com/2016/03/04/henry-obrien-and-the-round-towers/