Paul Christophersen & Niels Haislund 
Modern English Grammar on Historical Principles [PDF ebook] 
Volume 6

In Morphology the first thing to be considered is the form, and second to that comes the use made of it, in Syntax the order is exactly the reverse, but it is essential that in both parts of the grammar form and use should be mentioned in every case. Volume 6 looks at English Morphology including subjects such as personal endings in verbs, tense formation in verbs, the naked word, compounds, change of vowels, suffixes, and the endings s, st and n, to name a few.