Here is a link for Dutch Regiments from the blog British Army Lineages
http://britisharmylineages.blogspot.ca/ ... 0regiments
There is some info on the Regiment Gardes te Paard and the Gardes du Corps van Zijne Majesteit. The Gardes du Corps on the English establishment was considered the 4th Troop, Life Guards.
I wonder is it possible that, one: the Gardes te Paard and the Gardes du Corps was simply mixed up, a Troop being smaller than a Regiment, I know in my case for a while I did not know they were two different units, or two: The Gardes te Paard only provided a detachment for William III in Ireland as his escort?
I believe the author of the Opsrey Boyne is/was a member of Fighting Talk.
cheers
Edward