jarkman

Allusion has been made to forged certificates. These were manufactured by a class of mendicants who had something in them of clerkly skill. They were called Jarkmen, Jark being the cant term for a seal.

And these, what name or title e'er they bear, / Jarkman, or Patrico, Cranke, or Clapper-dudgeon, / Frater, or Abram-man; I speak to all / That stand in fair election for the title / Of king of beggars.