13. The astrolabe which Chaucer gave to his little son Lewis was adapted
for the latitude of Oxford. If, as is likely, the poet-astronomer checked
his statements in this passage by a reference to it, he would neglect the
difference in latitude between Oxford and the Canterbury road. In fact, it
is less than a quarter of a degree, and not worth considering in the
present case.
14. _gan conclude_, did conclude, concluded. _Gan_ is often used thus as an
auxiliary verb.