there-as thy foot stont; and go ner til thou mayst see the same top at
the poynt of 4, and sette ther another lyk prikke. Than mete how
5
many foot ben be-tween the two prikkes, and adde the lengthe up to
thyn eye ther-to; and that shal be the heyght of the tour. And note,
that 3 is [the] fourthe party of 12, and 4 is the thridde party of 12.
Now passeth 4 the nombre of 3 be the distaunce of 1; therfore the
same space, with thyn heyght to thyn eye, is the heyght of the tour.
10
And yif it so be that ther be 2 or 3 distaunce in the nombres, so shulde