David Rowland’s Patent Double Sextant & Circle—Charles Drewry— Nautical Mag 1834

'Rowland’s Patent Double Sextant and Circle (Fig. 1 & 2)'. Caption below picture:'Rowland’s Patent Double Sextant and Circle (Fig. 1 & 2)'. Antique engraved print, 1834. DATE PRINTED: 1834.

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