Certaine briefe advises given by Master Dee, to Arthur
Pet, and Charles Jackman, to bee observed in their
Northeasterne discoverie, Anno 1580.
IF we recken from Wardhouse to Colgoieve Island
miles for almost 20. degrees difference onely of longitude
very neere East and West, and about the latitude of 70.
degrees and two thirde parts: From Colgoieve to Vaigats
200. miles for 10. degrees difference onely in longitude,
at 70. degrees of latitude also: From Vaigats to the
promontorie Tabin 60. degrees difference of longitude (the
whole course, or shortest distance being East and West)
in the latitude likewise of 70. degrees, maketh 1200.
miles: then is summa totalis from Wardhouse to Tabin
600. leagues, or 1800. English miles. Therefore allowing
in a discovery voiage for one day with another but 50.
English miles, it is evident that from Wardhouse to
Tabin, the course may bee sailed easily in sixe and thirtie
dayes: but by Gods helpe it may be finished in much
shorter time, both by helpe of winde prosperous, and light
continuall for the time requisit thereunto.
When you are past Tabin, or come to the longitude of
142. degrees, as your chart sheweth, or two, three, foure,
or five degrees further Easterly, it is probable you shall
finde the land on your right hand runne much Southerly
and Eastward, in which course you are like either to fall
into the mouth of the famous river Oechardes, or some
other, which yet I conjecture to passe by the renowmed
Citie of Cambalu, and the mouth to be in latitude
about 50. or 52. degrees, and within 300. or 400.
miles of Cambalu it selfe, being in the latitude of 45.
degrees Southerly of the saide rivers mouth, or els that
you shall trend about the very Northerne and most
Easterly point of all Asia, passing by the province Ania,
and then to the latitude of 46. degrees, keeping still the
land in view on your right hand (as neere as you may with
safetie) you may enter into Quinsay haven, being the
chiefe citie in the Northern China, as I terme it for
distinctions sake, from the other better knowen.
And in or about either or both of these two warme
places, you may to great good purpose bee occupied the
whole winter, after your arrivall in those quarters, as
sometime by sea, sometime in notable fresh rivers, sometime in discreet view and noting downe the situation of
the Cities within land, &c. and ever assaying to come by
some charts or maps of the countrey, made and printed
in Cathay or China
, and by some of their bookes likewise
for language, &c. You may also have opportunitie to
saile over to Japan Island
, where you shall finde Christian
men, Jesuits of many countreys of Christendome some
and perhaps some Englishmen, at whose handes you may
have great instruction and advise for your affaires in