An Oracle That Warned the Writer When on Pilgrimage

Matutinus adest ubi Vesper, et accipiens te
Saepe recusatum voces intelligit hospes
Rusticus ignotas notas, ac flumina tellus
Occupat--In sancto tum, tum, stans Aede caveto
Tonsuram Hirsuti Capitis, via namque pedestrem
Ferrea praeveniens cursum, peregrine, laborem
Pro pietate tua inceptum frustratur, amore
Antiqui Ritus alto sub Numine Romae.

Translation of the above:--

When early morning seems but eve
And they that still refuse receive:
When speech unknown men understand;
And floods are crossed upon dry land.
Within the Sacred Walls beware
The Shaven Head that boasts of Hair,
For when the road attains the rail
The Pilgrim’s great attempt shall fail.