Kings used to send for our smiths and reward even the least skilful most richly. They built the merry town of Dale there in those days. Anyway they grew immediately rich and famous, and my grandfather was King under the Mountain again, and treated with great reverence by the mortal men, who lived to the South, and were gradually spreading up the Running River as far as the valley overshadowed by the Mountain. It had been discovered by my far ancestor, Thráin the Old, but now they mined and they tunnelled and they made huger halls and greater workshops - and in addition they found a good deal of gold and a great many jewels too. 'Long ago in my grandfather Thrór's time our family was driven out of the Far North, and came back with all their wealth and their tools to this Mountain on the map. Here is Thorin's description of Erebor as he knew it as a child. We know from the story that he is fit and very capable of fighting.) to counter the arguments I have read on other sites that RA is too young to play Thorin, going by my calculations, the make up department just has to age him about 10 (+) years.

Therefore, when Thorin meets Bilbo, he may be 195 years old in dwarf years but if we can hypothetically equate that in 'human years', he would have been the equivalent of about late 40's/early 50s in maturity. Their average life expectancy is 250 years! That is about 3 to 4 times our average life expectancy as human beings. Consider that a dwarf is only deemed 'battle ready' when they are over 30 ( Wikipedia) and they generally marry at around 100 years ( Tolkien Gateway). He describes himself as 'only a lad' when that happened. He was 24 in dwarf years when Smaug invaded Erebor - this is young for a dwarf. In the first chapter of The Hobbit, 'An Unexpected Party', Thorin talks about his memories of the Erebor of his youth. Location of Erebor or The Lonely Mountain in relation to the Iron Hills, Ered Mithrin (Grey Mountains), Mirkwood and The Misty Mountains.

Thorin king under the mountain