Note 535 — THE THIRD VOYAGE NORTH-WARD TO THE KINGDOMES OF CATHAIA and China, in Anno 1596.
Reading edition
Had the latitude of the place of observation been really more than 76° the sun ought to have been visible above the horizon at midnight on the 28th April, as its declination was then already more than 14°; and as on the 30th April its declination was 14° 55′, it ought to have had its lower edge full 39′ above the horizon at the time when at the place of observation it is said to have been visible “just above the horizon”. This is without taking into account the refraction, which under ordinary circumstances, would have made its visible altitude about 36′ more. Hence it is quite clear that they were not so far north as 76°. ↑