When the Silver of the Moonlight

 'I shall sing', said Freddie, directing at her glance which he rather thinks -though he is not sure- made her blush in modest confusion, 'a number entitled, "When the Silver of the Moonlight Meets the Lovelight in Your Eyes".'

[...]

'Right ho', said Freddie. 'I shall sing "When the Silver of the Moonlight Meets the Lovelight in Your Eyes".'

[...]

He reseated himself at the piano, and Freddie began to sing 'When the Silver of the Moonlight Meets the Lovelight in Your Eyes'.

Lord Emsworth and Others. 6 The Masked Troubadour

What the greasy bird was actually playing, he could not say, but it was not the twiddly-bits to 'When the Silver of the Moonlight Meets the Lovelight in Your Eyes'.

It was obviously a case for calling conference. [...]

'There is silver in the moonlight... What the hell are you playing?' sang Freddie.

'Eh?' said Jos. Waterbury.

'But its silver tarnished seems... You're playing the wrong song.'

'What are you singing?'

'When it meets the golden lovelight... I'm singing "When the Silver of the Moonlight Meets the Lovelight in Your Eyes", you silly ass.'

'Coo!'said  Jos. Waterbury. 'I thought you told me "Top Hat, White Tie and Tails". All right, cocky, now we're off.'

He switched nimbly into the correct channels, and Freddie was able to sing 'In your eyes that softly beams', without that set-your-teeth-on-edge feeling that he had sometimes experienced when changing gears unskilfully in his two-seater.

Lord Emsworth and Others. 6 The Masked Troubadour