Two"In Nomine" pieces.
No.19 by John Taverner.
Of course this is from Benedictus of Missa Gloria tibi Trinitas.
No.20 by Robert Golder. I don't know his detail information.
The Elisabethian Consort Music(Stainer & Bell) includes this piece.
This has 2 tonalities(Polytonality), but it isn't unusual in that age.
http://aeolianconsort.chakin.com/The_Baldwin_Collection.htm