Khulusi notes the observations of Walt Taylor (Arabic Words in English, 1933) that about a thousand main words of Arabic origin and many more of their derivatives, were incorporated into the English language through translations of French, Spanish and Latin re-workings of Arabic texts (mainly scientific and medical). However, about a third of all loan words (mainly conversational), were taken directly from Arabic, from the end of the 16th century to the time of the Restoration. Many of the words are now obsolete or rare but the ones still in everyday use have a completely English appearance, accent, stress and pronunciation.