Amaurote

a bridge in Utopia. Sir Thomas More says he could not recollect whether Raphael Hyghloday told him it was 500 paces or 300 paces long; and he requested his friend Peter Giles, of Antwerp, to put the question to the adventurer.

I cannot recollect whether the reception room of the Spaniard's
Castle in the Air is 200 or 300 feet long. I will get the next aeronaut
who journeys to the moon to take the exact
dimensions for me, and will memorialise the learned society of
Laputa.

—Dean Swift: Gulliver's Travels

Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894

Amazement

Amaurot