angled lacing

Preferred label: 

Two-hole lacing in which the two holes are arranged at an angle to the joints of the bookblock. This type of lacing can be found in both boards and laced cases, and the slips can be angled either upwards or downwards, and will often be found angled in one direction on one side and in the other on the other side.

Pickwoad, The structures and materials... (2014)

Nicholas Pickwoad (2014), "The structures and materials of commercial bookbindings in the Arcadian Library", in The Arcadian Library: Bindings and Provenance, Studies in the Arcadian Library, Oxford, Oxford University Press, pp. 1-78.

Additional reference: 
p. 261-263
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