l. 53. _In this thy booke, such will their nothing see._ After some hesitation I have adopted the 1635-54 reading in preference to that of 1633 and 1669, 'there something.' I do so because (1) the MSS. support it. Their uncertainty as to 'their' and 'there' is of no importance; (2) 'there' is a weak repetition of 'in this thy book', an emphatic enough indication of place; (3) 'their nothing' is both the more difficult reading and the more characteristic of Donne. The art of a statesman is a 'nothing'. He uses the word in the same way of his own Paradoxes and Problems when sending some of them to Sir Henry Wotton, and with the same emphatic stress on the first syllable: 'having this advantage to escape from being called ill things that they are nothings' (An unpublished letter, quoted in the _Cambridge History of Literature_, vol. iv, p. 218). The word was pronounced with a fully rounded 'no'. Compare _Negative Love_, l. 16. With the sentiment compare: 'And as our Alchymists can finde their whole art and worke of Alchymy, not only in Virgil and Ovid, but in Moses and Solomon; so these men can find such a transmutation into golde, such a foundation of profit, in extorting a sense for Purgatory, or other profitable Doctrines, out of any Scripture.' _Sermons_ 80. 78. 791. 'Un personnage de grande dignité, me voulant approuver par authorité cette queste de la pierre philosophale où il est tout plongé, m'allegua dernièrement cinq ou six passages de la Bible, sur lesquels il disoit s'estre premièrement fondé pour la descharge de sa conscience (car il est de profession ecclesiastique); et, à la verité, l'invention n'en estoit pas seulement plaisante, mais encore bien proprement accommodée à la défence de cette belle science.' Montaigne, _Apologie de Raimond Sebond_ (_Les Essais_, ii. 12). PAGE =32=, ll. 59-61. _To take a latitude, &c._ The latitude of a spot may always be found by measuring the distance from the zenith of a star whose altitude, i.e. distance from the equator, is known. The words 'At their brightest' are only used to point the antithesis with the 'dark eclipses' used to measure longitude. ll. 61-3. _but to conclude Of longitudes, what other way have wee, But to marke when, and where the dark eclipses bee_.