The firm hold which Thor had upon the minds of his worshippers is also illustrated by the way in which some of the converts to Christianity felt uneasy at abandoning him. Thorgils of Flói, in the south-west of Iceland, was one of the first to accept the new faith, and more than once he dreamed that Thor came to him with reproaches and threats for this desertion. Thorgils was firm, and defied the angry god, but his later perils at sea were believed by his companions to be the work of Thor, and some of them even wished to sacrifice to him for a fair wind, saying that people had fared much better when they made offerings to him. The prominent place held by the worship of Thor in the old religion is also indicated by the frequent mention of images of the god in various temples (as will appear in a later chapter); this fact acquires special significance when contrasted with the lack of similar statements regarding Odin. It is also extremely probable that it was Thor, and not Odin, to whom the vague names of 'Land-god' (_Land-áss_) and 'The Almighty God' were given; the latter was used, coupled with the names of Frey and Njörd, in an old oath-formula. Having thus made the position of Thor among the Scandinavian gods as clear as the evidence admits of, it remains to show what manner of god his worshippers supposed him to be. On this point there is unfortunately less direct evidence than could be wished. In origin Thor was the thunder-god, and it is therefore natural to find him spoken of as 'the strongest of all the gods.' His weapon, the thunderbolt, was imagined as a hammer, mythologically known by the name of _Mjölnir_, and was especially used by him to protect the gods and men against giants and other evil monsters. To grasp it with he had iron gloves, and he was also possessed of a girdle of might which increased his strength twofold. In his journeys, of which the mythological writers have a good deal to say, he sometimes rode in a chariot drawn by two goats. Of these details there is very little trace in historical sources, although one passage (of doubtful value) speaks of an image of Thor seated in his chariot. The hammer, however, was certainly the distinctive symbol of the god, and representations of it were evidently in common use as sacred and protective marks. Not only is it frequently cut on stone monuments, but small figures of it were apparently used as amulets, of which a number have been found in Denmark and Sweden. When the Danish prince Magnus returned from an expedition into the heathen districts of Sweden in 1123, he brought back with him as trophies some Thor's hammers of metal. It is not clear how far such models of the hammer were used in religious ceremonies; that it was employed at weddings 'to hallow the bride' appears to be highly probable, but there is no direct historical evidence to prove it.