Read about Maj. General Charles Stuart (1758-1828), whose work "Vindication of the Hindoos" attracted vitriolic replies by the missionaries of his day. Unfortunately, I have not been able to obtain Part I of his work; only Part II, his reply to the attacks on his first work, seems to be available on the web.
PS: since I wrote the above, I have obtained a digitized version of part I, but I'm not sure all the pages are present.
PS: since I wrote the above, I have obtained a digitized version of part I, but I'm not sure all the pages are present.