What's in a letter?

'Oh! Well done!' mooed Norma. 'You've got the top open.'

Captain Bill looked at Norma.

'I'm managing perfectly well on my own, thank you very much.'

'So I can see,' replied Norma, 'I mean, just a week to get an envelope open!'

'Sarcasm does not become you,' said Captain Bill. 'Anyway I'm sure you've got something better to do?'

'Not really,' said Norma.

'Walking with Horace?' suggested Captain Bill.

'He wants to wait until the weather is a bit more miserable,' replied Norma, '...it's a poet thing.'

'Annie then?'

'I was going to go to the library with her but Cyril's volunteered to do that.'

'Library,' asked Captain Bill.

'She wants to see if Bertha's got any books that might help with her teacher training,' replied Norma.

'She's still pursuing that then?'

'It would seem so,' replied Norma. 'So are you going to look inside? You'll need to get it off the stick first.'

'Thank you!' mooed Captain Bill, 'I was wondering how I was going to manage it....what with never having opened a letter before!'