These maps were produced in 1837, Newgrange and Knowth are both referred to as Moats.
In a later hand written alteration Newgrange is referred to as a Tumulus.

Newgrange showing the internal passage and chamber, date of map 1837.

Close up of Newgrange showing the Standing Stones, date of map 1837.

Knowth Mound referred to as a Moat (top of map), date of map 1837.

Close up of Knowth with a hand written note showing one entrance, date of map 1837.