soundage--prophetes.ai

† ˈsoundage Obs.^—1
  In 6 sownage.
  [f. sound v.² + -age.]
  A due paid for the taking of soundings.

1562 in R. G. Marsden Sel. Pl. Crt. Adm. (Selden) II. 64 Towage, sownage, and petye lodemanshippe with all other accustomed averages.

Oxford English Dictionary