http://www.archive.org/details/grammarofarabicl01caspuoft (Publisher version)
https://archive.org/details/AGrammarOfTheArabicLanguageV1 (Publisher version)
arabic_wright1896_1.pdf (Publisher version), 25MB
arabic_wright1898_2.pdf (Publisher version), 18MB
Caspari, C. P. (1896). A grammar of the Arabic language: translated from the German of Caspari, and edited with numerous additions and corrections. Cambridge: Univ. Press.