I am not aware of any earlier usages, but would (as always) be glad to hear of any.
I am very glad to have it on my shelves.
We would be glad to see much more evidence from different environments and different types of finegrained material.
I am glad to say that this book is an exception.
It makes me sad to see people suffer and glad to help.
Revealingly, the center scholars named have been glad to embrace the work of such emigrant scholars.
I, for one, am glad that the universe has no meaning, for thereby is man all the more glorious.
It is like a house into which the glad sunshine never enters.