This extract seems rather apt:
And when the Foreign Office find a Treaty’s gone astray,
Or the Admiralty lose some plans and drawings by the way,
There may be a scrap of paper in the hall or on the stair -
But it’s useless to investigate - Macavity’s not there!
And when the loss has been disclosed, the Secret Service say:
“It must have been Macavity!” - but he’s a mile away.
You’ll be sure to find him resting, or a-licking of his thumbs,
Or engaged in doing complicated long-division sums.
Incidentallt TS Elliott was, rather improbably, a great friend of Groucho Marx