On Carl Smith cards, there are records about the Terrace from #1 to #9, with residents named earliest on 1865.
As early as 1864, it is found that Mosque Terraces quoted on newspapers, as above snapshots. [1]
The same ad had been repeating from around March through December end (except most of August). The To let ad with 'at Reduced Rentals' added from around late August. On its right, it is about an August incident.
In fact, earlier on June 7 the news tell of 'The Storm', not an once in a hundred year one - but outcome is rather appalling :
... No less than five houses in this location were razed to the ground. Elgin Street,
Shelley Street, Aberdeen Street, and Caine Road were quite impassable owing to the
bursting of the sewers. A large quantity of the retaining wall of Mosque Terrace was car-
ried away; the water thus making a channel for itself, rushed down the hill destroying in
its course European habitations and stables; among these we may mention our own stables,
which were situated in the Caine Road adjacent to Police station No. 9, these are
totally annihilated by the torrent, which from thence poured with increased velo-
city to the opposite side of the road and there laid waste the wall and garden belonging
to Captain Heaton, forcing a passage through his bungalow, which consequently
became entirely flooded, the water and mud in the rooms being little less than
three feet in depth. Two houses below this in Elgin Terrace were also inundated, one
occupied by Captain Bernard, the other by Dr. Lockhead, in all three instances of course
most of the furniture is entirely destroyed. [2]
It may not be a severe rain storm in the early decades, compared with the later ones. (e.g. link)
It is recorded as :
dense fog attended with heavy rain and lightning and thunder with heavy squalls [3]
I think above narratives possibly provide anchors for other places, people or keywords, if somehow they are on your research radar currently.
It may become a useful piece of the jigsaw.
sources
1. left side : HK Daily Press, 1864-3-30
right side : HK Daily Press, 1864-8-15
2. HK Daily Press, 1864-6-7, p.3; also on Overland China Mail, 1864-6-13
3. Weather Tables on Administrative Reports 1864
remark
interesting keywords : stables/stabling/mew
occur totally 8 times in two short texts posted above.