Following the format elsewhere in the Square I assume this was a part of number 16 separated out after the departure of Catherine Alexander (see above)
1864-1891 Gardiner, James Biscuit baker, navy biscuit and breadmaker
(also 1870-1872 Gardiner, James Jnr Ship bread maker)
1895-1900 Segar, George Xavier 16a Barrister at Law