Statistics for occurrence #1 of “May Io” in chapter 5 of Thomas Wentworth Higginson, Olde Cambridge:

... business side of editorship, however, it was a great relief when Fields took the helm; and the following two letters will indicate the point where Lowell was deficient. Theodore Parker had died on May Io , 1860, and I had taken pains to write promptly a sketch of him, based on intimate knowledge, for early publication in the Atlantic. Then followed a delay which I could not understand, but which the s...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
May Io 6 2 0 0 0 user votes

† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.