Belgravia.
[Similar explanations have been kindly furnished by S. C., HERMES,
P. K., R. P., J. F. M., J. D. A., and also by W. (2), who refers to
Mead's _Medica Sacra_ for an explanation of the whole passage.]
_St. Thomas's Onions_ (Vol. iii., p. 187.).--In reference to the Query, Why
is St. Thomas frequently mentioned in connexion with onions? I fancy the
reason to be this. There is a variety of the onion tribe commonly called
_potato_ or _multiplying onion_. It is the rule to _plant_ this onion on
St. Thomas's day. From this circumstance it appears to me likely that this
sort of onion may be so called, though I never heard of it before. They are
fit for use as large hard onions some time before the other sort.