7
They stood on the threshold.
'This is the shop,' Henry explained, 'where Hump works.'
'How perfectly fascinating!' exclaimed Mrs Henderson. Her quick eyes took in lathes, kites, models of gliders, tools. 'Bring him 'straight down here. I won't stir from this room till he's explained everything.'
'Hump!' called Henry, with austere politeness, up the stairway: 'Would you mind coming down?'
He came—tall, stooping under the low lintel, in spotless white, distant in manner, but courteous, firmly courteous.
Mrs Henderson, prowling about, lifted a wheel in a frame.
'What on earth is this thing?' she asked.
'A gyroscope.'
'What do you do with it?'