a bit more detail on No. 2 Grafton St.
1894 : Yeates & Son, opticians and mathematical instrument makers to
the University and Dublin Port Docks Board.
workshops and export dept. 25 Suffolk St.
Stephen M. Yeates - res. Sorrento Villa, Dalkey
1879 : Yeates & Son, opticians and mathematical instrument makers to
the University and Dublin Port Docks Board.
also at 136 St. Stephen's Green
res. Stephen Yeates
1863 : G. Yeates & Son, opticians and mathematical instrument makers to
the University and Vicar's Lodge, south Circular Rd.
The index gives his first name as George, and also mentions another optician with the same surname :
Horatio Yeates, optician &c, 23 Dawson St.
George is also listed at the address in 1852, with an additional address (which appears to be his residence) at 11 Wellington Place, Clanbrassil St.
Earlier listings for number 2 list Yeates as opticians at the address back to at least 1827.
The earliest listing for an optician with the surname that I can see at the moment is in 1813 :
89 Dame St, Samuel Yeates - optician
The Yeates business continued at the address up to the late 1930s at least, and they seem to have added an additional trade of 'Radio Dealers' to their business.
It looks like No. 1 Grafton street was across the street to the north, and inside the Trinity College grounds - there is a listing for Grafton St in 1848, before number 2 on the other side of Nassau St :
1. Provosts House, Trinity College, Rev. P. Sadlier, D.D. prov.
Shane