The architect who designed the North Ell of Esperanza in 1893.  I found a rather decent short bio of him here: http://www.iwwwp.com/sghrl/images/Winter2008-09.pdf

One serious typo in it though: Julie was dead.  Hapgood designed the North Ell for WWE!  But the rest is fairly accurate.  Though it is somewhat uncertain as to whether all of those people visited Esperanza, WWE definitely knew them and was friends with them.  Family lore has it that Hapgood built the big fireplace himself, as the bricklayers had refused to try such a low, long arch.  He was right, it is perfectly stable.