So where and how might you hear the voice of the horns of Oromë and the hate of Morgoth, when neither Oromë nor Morgoth were present.
In that moment Huan leaped from the thicket upon the back of the Wolf, and they fell together fighting bitterly; and no battle of wolf and hound has been like to it, for in the baying of Huan was heard the voice of the horns of Oromë and the wrath of the Valar, but in the howls of Carcharoth was the hate of Morgoth and malice crueler [Tolkien spells it "crueller", causing me to ponder on crullers filled with malice...but I digress!] than teeth of steel; and the rocks were rent by their clamour and fell from on high and choked the falls of Esgalduin.
Frodo and Bilbo followed the wizard quickly along the winding path back to the house; behind them, uninvited and for the moment forgotten, trotted Sam.
Gandalf led them...
Elrond was there, and several others were seated in silence about him. Frodo saw Glorfindel and Gloin; and in a corner alone Strider was sitting.
There was a younger dwarf at Gloin's side: his son Gimli. Beside Glorfindel there were several other counselors of Elrond's household, of whom Erestor was the chief; and with him Galdor....
There was a strange Elf clad in green and brown, Legolas....
"Here", said Elrond, turning to Gandalf, "is Boromir..."