it appears that some part of the journey was made on horseback, but other lines[294] show that the latter part was made by water, and that a severe storm was encountered on the voyage. In Book iv., imitated by Horace (Sat. ii. 2), and by Persius in his third satire, was included the discourse of Laelius against gluttony. In this book mention was made of the sturgeon which gained notoriety for Gallonius[295]. Book v. contained a letter to a friend of the poet, who had neglected to visit him when ill. Book ix. was composed of a dissertation on questions of grammar, orthography, and criticism. Book xi. treated of the wars in Spain and Transalpine Gaul, and contained criticisms and anecdotes of various public men. Book xvi. was named 'Collyra,' in honour of the poet's mistress. In other books the castigation of particular vices formed a prominent topic, and some of the latest (probably the earliest in the order of composition), were largely filled with personal explanations and with criticisms of the older poets. But the desultory, discursive, self-communing character seems to have been common to all of them; and it would be contrary to our evidence to speak of any single book as composed on a definite plan, or as treating of a special topic. The fragments however, when read collectively, bring out the main sources of interest which the Romans found in the writings of Lucilius; first, the interest of a self-portraiture and close personal relation established with the reader[296]: second, the interest of a censorious criticism on politics, morals, and literature[297].