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IF any Gentleman studious in the Mathematicks, have, or shal have occasion for Instruments thereunto belonging, or Books to shew the use of them, they may be furnished with all sorts, usefull both for Sea or Land, either in Silver, Brass, or Wood, by Walter Hayes at the Cross-daggers in Moore-Fields, next Door to the Popes-head Tavern; where they may have all sorts of Maps, Globes, Sea-Plats, and Mathematical Paper, Carpenters Rules, Post and Pocket-Dyals for any Latitude, Steel Letters, Figures, Signs, Planets, or Aspects, at reasonable Rates.