What is thus inferred from the historical record is corroborated by philology. A number of words of Celtic origin are found spread through the whole group of Germanic languages, including the Scandinavian languages and English, which was originally a mixture of Low German dialects. Some of these words are especially connected with the political side of civilisation and are therefore especially indicative of Celtic political predominance at the time of their adoption into Germanic speech. Thus the German word _reich_, meaning realm or royal dominion, is traced to the Celtic _rigion_, represented in early Irish by _rige_, meaning kingship. From the Celtic word _ambactus_, used by Cæsar in the sense of "client" or "dependent," indicating one of the retainers of a Gallic nobleman, but originally signifying "one who is sent about," a minister or envoy--from _ambactus_ is derived the German word _amt_, meaning "office, charge, employment." From _ambactus_ are also derived the words _embassy_ and _ambassador_, with their kindred terms in the Romance languages. From the Celtic word _dunon_, a fortified place, represented in Irish by _dun_, is derived the word _town_ in English and the cognate words in the other Germanic languages. Professor Marstrander holds that several of the names of the numerals in all the Germanic languages, and therefore in the original German speech from which they have diverged, are formed from or influenced by Celtic names of the same numerals. If this is so, it indicates a thoroughly penetrating Celtic influence among the ancient Germans, for the names of the numerals may be regarded as among the most native elements of speech, so much so that it is said that facility in the speaking of two languages rarely exists to the degree of being able to reckon numbers with equal readiness in both, and that the language a person uses in ordinary reckoning must be regarded as his native and natural speech.