The Green Dragon is shown at 14 St Margaret's Plain in the 1871 census, which is the same address as the Dog & Partridge in the 1891 and 1901 censuses. One report puts it opposite the Running Buck, which would make it either where the building that was Bar Fontayne was later erected or nearby.

It's shown in a World War 1 photograph to the left (east) of GT Cook, shoeing smith, 12 St. Margaret's Plain (south side). It's not a pub in the 1932 Kelly's Directory. (Ipswich at War, John Smith, et. al.)

The Dog & Partridge is also reported as being on Old Foundry Road. This may actually be another name for the Partridge. (Or perhaps it had entrances in both streets?)

Although one source suggests 1915 for the closure date, the pub is listed in the Borough Police licensed premises register 1903-1923, so must have closed after 1923. The entry in the 1909 Rates book has been annotated "Late" Dog & Partridge. This book seems to have been in use until the early 30s, so the 1932 date seems reasonable. This may tie in with the possibility that it stood where Bar Fontayne was, as that building was erected in the 1930s, so perhaps the pub closed and was demolished.