The penchant for classical allusion in Irish lyrics is not exclusive to this type of music. 

In the military history of all these centuries constant allusion is made to the Rhine, its passages and its fortresses.

In the military history of all these centuries constant allusion is made to the Rhine, its passages and its fortresses.

The beginning of the book has an allusion which hints at how the book ends.

A too frequent allusion to Greek mythological names is a defect sometimes observable in his writings.