Decapods Poems

Ten

The French call it "dix" - the Romans used X
The number of lords that are leaping Xmas
The total of fingers and thumbs on both hands
The base used for metric - both metres and grams
Count hydrogen atoms in compound butane
Downing Street doorstep, our PM's domain
Legs on a lobster and all decapods
Commandments and plagues that were given by God
The number of toes on the end of our feet
The lines in this poem - that makes it all neat