Helm did not dream that he was accidentally sketching a horrible truth.
"Barlow's!" exclaimed Farnsworth.
"Yes, Barlow's, no mistake--" Two more men reeled from a port-hole, the blood spinning far out of their wounds.

Indeed, through every aperture in the walls the bullets were now humming like mad hornets.
"Close that port-hole!" stormed Hamilton; then turning to Farnsworth he added: "We cannot endure this long.

Shut up every place large enough for a bullet to get through.

Go all around, give strict orders to all.
See that the men do not foolishly expose themselves.

Those ruffians out there have located every crack." His glimpse of Beverley and the sinister remark of Helm had completely unmanned him before his men fell.