he growled , the ibis leapt off before his vicious monoi , but through many he rode with many ibis gored by the iron tipped horns of the flagrant beast , and many were left trodden into the ground as the beast rushed furiously upon the breached segment , there came the thud like that of many falling stones , a rising of thick columns of dust that blurred and dispelled both defenders and invaders , and as the dust dissipated nigh dusk , the piled rubbles had been cleared , the monoi laid beside the first , its head mangled within its cloven helm , and many of the defenders and invaders slain amongst the ruins .