The photo id 323569 of 'The Queen' from the 1910 Glen Saint Mary Nurseries catalogue is, in my opinion, a dead ringer for this rose in the habit of the arching branches, nodding flowers and also the shape/profile of the flowers. The foliage seems to be very similar too. It would perhaps strengthen the argument that this could be 'Souvenir d'un Ami' (or at least that the white "Bird Children" from which the pink sported is 'The Queen").