One somewhat speculative blocked-up lancet window of the Early English period is the remotest thing that remains to Petersham old church; which is, for the rest, chiefly of George the First’s time. It is, of course, dedicated to St. Peter. Nowhere do we find the slightest real trace of the ancient cell of Chertsey Abbey which is supposed to have existed here, on the Abbey lands. The curious mass of brickwork along the footpath leading out of River Lane and between the gardens of Church Nursery and the filter-beds of the Richmond waterworks, is commonly said to have been a portion of those ancient ecclesiastical buildings, but no one has ever discovered the slightest hint of church or monastic architecture about that problematical fragment, nor has its purpose been hinted at. The footpath rises sharply between somewhat high walls, and is indeed carried over an arch. The old village folk long knew the spot as “Cockcrow Hill”; but during the last two years, in course of the works undertaken for the neighbouring filter-beds, the brickwork has been patched and the pitch of the lane leading over the arch lowered; so, doubtless, the name of “Cockcrow Hill” will become among the things forgot. If a theory may be entertained where no facts are available, this building was probably a bridge across some long-vanished or diverted stream which at one time flowed from the high ground of what is now Richmond Park, across these level meadows, and so into the Thames. But if there be indeed no architectural features in this brickwork, there is an almost monastic air of seclusion about the rather grim and very picturesque old seventeenth-century gazebo that stands beside this self-same lane. There is some speculative interest in it, for no one can certainly declare to what this old four-square two-storeyed building of red brick, with the queer peaked roof, belonged. The presumption is that it was at one time a gazebo, or garden-pavilion, attached to the walled garden of Rutland Lodge, adjoining, an early seventeenth-century mansion, the oldest house in Petersham. Presumably, when it was built, its upper windows, some of them long since blocked, had a clear look-out across the unenclosed meadows to the river. The meadows are still there, but a fenced-in garden and an orchard now intervene, and by some unexplainable changes, the building, although at the angle of the walled garden of Rutland Lodge, has no communication with it, and is in fact included within the grounds of Church Nursery and the garden of the modern house called since 1907 “Rosebank,” presumably for the usual contradictory reasons that roses have ever been conspicuously absent from that garden, and that the site is a dead level. Much patching and altering has been done at times to the old gazebo, and attempts have been made to convert it into a cottage. Hence the added fireplaces and the chimney, not requisite in a garden summer-house, but indispensable for living in.