Famous painting

Famous painting
You mean to say that that machine has travelled into the future?' said Filby.
`Into the future or the past--I don't, for certain, know which.'
After an interval the Psychologist had an inspiration. `It must have gone into the past if it has gone anywhere,' he said.
`Why?' said the Time Traveller. You mean to say that that machine has travelled into the future?' said Filby.
`Famous painting
Because I presume that it has not moved in space, and if it travelled into the future it would still be here all this time, since it must have travelled through this time.'
`But,' I said, `If it travelled into the past it would have been visible when we came first into this room; and last Thursday when we were here; and the Thursday before that; and so forth!'
Famous painting