Originally Posted by
KerryIrons
If you are actually looking for advice (and based on this and past threads, it doesn't seem like you are) then you should provide a whole bunch of information about the sound, when it occurs, etc.
The pertinent information lies within the OP's postings in this thread.
The commencement and cessation of the ticking are random, and the ticks are rhythmic with no correlation to speed or cadence.
"I talked of engines—of noisy engines—but still the sound increased—and what could I do? It was a low, dull, quick sound—much such a sound as a watch makes when enveloped in cotton."
- E.A.P.