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