2 farthings = 1 halfpenny
2 halfpence = 1 penny (1

)
3 pence = 1 thruppence (3

)
6 pence = 1 sixpence (a 'tanner') (6

)
12 pence = 1 shilling (a bob) (1s)
2 shillings = 1 florin ( a 'two bob bit') (2s)
2 shillings and 6 pence = 1 half crown (2s 6

)
5 shillings = 1 Crown (5s)