A fortress of two triangular towers for two castellans
Twin triangular towers 150 feet apart, joined by four walls, with ravelins, moats and bridges
Folio 86v proposes a fortress with two principal towers serving two castellans. Two triangular towers face each other, with small flanking turrets at their opposite angles for lateral defence, set 150 feet apart and joined by four walls that form rooms, chambers and covered walks. The entrances are arranged so that neither castellan can admit or remove anyone without the other's consent, to forestall fraud or cowardice, each tower being entered through the other by way of ravelins, moats and bridges.
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Two triangular towers with flanking turrets
The keep is built from two triangular towers whose faces are turned toward each other, with two little towers set at their opposite angles to defend laterally. A distance of 150 feet separates one tower from the other.
Four connecting walls with rooms and walks
The two towers are joined by four walls that make divisions of rooms, inner chambers and covered walks, giving the keep its habitable interior between the defensive points.
Entrances held jointly against treachery
The entrances are ordered so that neither castellan can put into the keep or draw out anyone without the other's consent, to avoid every fraud or act of cowardice; each tower has its entrance through the other, with ravelins, moats and bridges.