[1]one—for them. MS. and P.
[A Comb-conveyance for Letters.] The entire ingenuity of the kind of conveyance proposed consists in the skill of the workman to provide a receptacle in so small an article, not open to suspicion when handled by a spy.
82.
A Knife, Spoon or Fork in an usual portable Case, may have the like conveyances in their handles.
[A Knife, Spoon or Fork-conveyance.] William Bourne’s 73rd Device is—“How for to convey letters secretly.” One means is to be found in a Dog’s collar. Another in a water-tight metal case, to be inserted within a bottle of wine. “Inventions or Devices,” 1578.
83.
A Rasping-mill for Harts-horn, whereby a child may do the work of half a dozen men, commonly taken up with that work.
[A Rasping-mill.] This description of mill is largely in use for rasping dye-woods, and has undergone a great variety of modifications.
84.
An Instrument whereby persons[2] ignorant in Arithmetick may perfectly observe Numerations and Substractions[3] of all Summes and Fractions.