His voice laid on her: Beren came,
And doom fell on Tinúviel
That in his arms lay glistening.
As Beren looked into her eyes
Within the shadows of her hair,
The trembling starlight of the skies
He saw there mirrored shimmering.
Tinúviel the elven-fair,
Immortal maiden elven-wise,
About him cast her shadowy hair
And arms like silver glimmering.
Long was the way that fate them bore,
O'er stony mountains cold and grey,
Through halls of iron and darkling door,
And woods of nightshade morrowless.
The Sundering Seas between them lay,
And yet at last they met once more,
And long ago they passed away
In his attempt, Beren was taken prisoner by Morgoth. 
 Lúthien was held prisoner by her father, but managed to escape, and with the aid of Huan, a horse-sized highly intelligent dog, she managed to defeat various enemies (including Sauron) and free Beren. 
 After a terrible journey (during which the great Noldor elf Finrod sacrificed himself to save them), Lúthien put the entire court of Morgoth at Angband to sleep, and Beren cut a simaril from his crown. But as he attempted to cut out another, the blade broke and woke Morgoth. A great werewolf servant of his approached the pair, and Beren held the silmaril in front of him, to defend them from the wolf. But Carcharoth bit his hand off (thus Beren became known as Erchamion, “One-Hand”). 
 They escaped back to Doriath, where Beren proclaimed he held a silmaril in his hand, displaying his stump. 
 Beren participated in the hunting of Carcharoth, which ended in the deaths of Huan and Beren himself.