Walter W. Skeat 
Concise Etymological Dictionary of the English Language [PDF ebook] 

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. I do not, in general, give the history Of the use of the word under discussion, unless there is some special point which is necessary to be known for the sake of the etymology. For such history, accompanied by illustrative comments. References, and discussions, I must refer students to the unabridged work.