Upon the frost in the year 1739-40.
[London] : Printed on the ice upon the Thames at Queen-Hithe, January the 31st,
1739-40.
The "Great Frost" caused the Thames to freeze from Dec. 25, 1739 to Feb., 1740.  Several printers printed and sold keepsakes of the occasion, of which this is one.  After the verse, the buyer's name is printed.
Verse - "Behold the liquid Thames now frozen o'er!".
ESTC