17 April 1876 • (MS, on printed form letter: Mac Donnell, UCCL 13785)
I thank you very much for your invitation, but am compelled to decline it, as I am not lecturing at all this season, other duties rendering this course necessary.
P. S.Your letter has reached me at last, after all these weeks. I wish I could say yes to your proposition, but I have gone to work, now, & cannot quit the harness any more this year.
MS, on printed form letter, collection of Kevin Mac Donnell.