Struck gold

Murphy had been told that the streets of London were paved with gold. Newly arrived in that fair city he was ambling along enjoying the morning air when he passed a pub outside which last night's rubbish had been stored in plastic bags. One had been kicked open and all over the pavement were gold tops from beer bottles.

'Gold,' said Murphy. 'I've struck a vein!'

Hurriedly he gathered all he could stuff into his pockets and marched into the pub.

Till have a double whiskey,' he called to the barman, and placed a bottle top on the counter.

'This is tin,' sneered the barman.

'Thank God,' said Murphy. 'I thought it was only five - I'll have two double whiskies.'