this werk of my labour or of myn engin. I nam but a lewd compilatour
of the labour of olde Astrologiens, and have hit translated
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in myn English only for thy doctrine; and with this swerd shal I
sleen envye.
I. The firste partie of this tretis shal reherse the figures and the
membres of thyn Astrolabie, bi-cause that thou shalt han the
grettre knowing of thyn owne instrument.
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II. The second partie shal teche thee werken the verrey