No wonder I couldn't find it - it was out of place.

[…] this boy, though at present a juggins, had the makings of a superb creature.

In block ciphers, S-boxes are typically used to obscure the relationship between the key and the ciphertext.

It was not just the confusion that unhappiness brings, it was not just the loneliness, it was the despair that accompanies all those emotions that turns unhappiness into utter misery.