They endeavour to prove that, at certain seasons, a powerful wind blows in one direction, and this performed the operation, Others, that, at low water, one part is fordable;
(this; performed; the operation) (one part; is; fordable; L:at low water) (a powerful wind; blows; in one direction) Context(a powerful wind blows,List([50, 71))):(They; endeavour; to prove that) Context(They endeavour a powerful wind blows,List([0, 71))):(They; endeavour to prove; that)
a powerful wind blows,List([50, 71)) They endeavour a powerful wind blows,List([0, 71))
this one part a powerful wind They They
performed is blows endeavour endeavour to prove
the operation
fordable L:at low water
in one direction
to prove that
that