(Latin) Can you translate this?

[Takahashi_Natsumi]

I need some help translating this sentence:

In itinere Sextus (Sextus is a name) omnia de mure mortuo marco explicavit.

The first part of the sentence is what's really confusing me.

And what is "potero" in English?  

[blue_lutra]

working on it . . .

omnia is all, mortuo is 'i die' (i think), marco is mark

i can't figure out any more and there are no helpful translators online  

[toyDUCKs]

It's something about Sextus explaining something on a journey  

[The Cherry Aphrodisiac]

hahaha, i have the same Latin book as you, Ecce Romani! {if it is}...thats kind of funny... I cant translate it though... im on like chapter 3...  

[Small Strawx]

Takahashi_Natsumi

I need some help translating this sentence:

In itinere Sextus (Sextus is a name) omnia de mure mortuo marco explicavit.

The first part of the sentence is what's really confusing me.

And what is "potero" in English?

"potero" = able

on a road Sextus something about something dead something explanation? sweatdrop  

[Dragona_36]

I think it says "On the journey Sextus explains that all are marked from the dead." I could be wrong in my translation though.