Silkewerk - A broad lace

A broad lace

It is the very first movement on each hand, when the B loop is taken, that determines if the top and bottom layers of the braid will be connected or not.

In this case, the braid is only connected (reversed) along one side, and left open (unreversed) along the other, allowing the braid to unfold into a wider structure.

Take seven loops, and place them on the following fingers:
Right hand: B C
Left hand: Two on A, two on B, one on C

Work with the right hand:
A takes through B C right, the front loop of B left reversed.
B takes the front loop of A left unreversed.
A takes through the front loop of B right, the loop on C left unreversed.
Lower the left loops.

Work with the left hand (in mirror image):
A takes through B C left, the front loop of B right unreversed.
B takes the front loop of A right unreversed.
A takes through the front loop of B left, the loop on C right unreversed.
Lower the right loops.

Repeat from the beginning.

Source: Tollemache 20

A broad lace of 7 bows.
Set 7 bows on thy hands in the manner of the hollow lace before [T19] and work in the same manner saving where as ye take in the hollow lace [T19] the former of B on each hand reversed in this lace thou shalt take the bow of B left reversed and the bow of B right unreversed and so begin again.

Source: Harleian 21

For to make a brode lace of 7 bows.
Set 7 bows on thy fingers in the manner of the hollow lace of 7 bows [H13] and work in the same manner of the hollow lace [H13]; save that thou takest in the hollow lace the former bow B of either hand reversed, in this lace thou shalt take the bow of B left reversed ad the bow of B right unreversed.

Source: Serene 25

A broad lace for Purses of seven bows.
Without a fellow make them, and be two bows upon B, C of thy right hand, and two sundry bows upon A of thy left hand and other two sundry, upon B of thy left hand and one upon C of the same hand, and then shall you take with A of thy right hand through B C of the self hand, the bow that is uppermost upon B left unreversed, and B right shall take the bow utterest [uppermost] upon B [*should be A*] left, unreversed, and through the left bow A right shall take the bow C left unreversed. And take good care that the bows that are on any finger meng [merge?] them not, and then low thy bows of thy left hand, and then shalt thou take with A of thy left hand through B C of the self hand, the bow that is uttermost upon B right reversed, and B left, shall take the bow that is uttermost upon A right unreversed, and through that self bow A left shall take the bow C unreversed of the right hand, and low thy bows, and begin again.