re the two addresses mentioned
22 Bridge Street - there are two Bridge Streets in Dublin city, an upper and lower. Bridge St Lwr is off Merchant's Quay and so close to the convent mentioned earlier.
In 1877 22 Bridge St. Lwr is listed as :
Heather Brothers & Co., wholesale boot and shoe manufacturers
20,21 & 22 Bridge St Upr
Jos. Allen & Co. Merchants
and in 1891 22 Bridge St. Lwr is listed as :
Heather Brothers & Co., wholesale boot and shoe manufacturers
factory 57 to 61 Augustine St
22 Bridge St Upr
Mrs. Ellen Dorrington, brush manufacturer
I dont see any mention of a street named Saxon place in Dublin city in the 1870s - I checked street listing from 1872, and indexes from 1877 and 1879.
Shane