  S190426c / GW190426_152155 was the first probable neutron star - black hole
merger candidate detected by the LIGO-Virgo Collaboration. We undertook a tiled
search for optical counterparts of this event using the 0.7m GROWTH-India
Telescope. Over a period of two weeks, we obtained multiple observations over a
22.1 deg^2 area, with a 17.5% probability of containing the source location.
Initial efforts included obtaining photometry of sources reported by various
groups, and a visual search for sources in all galaxies contained in the
region. Subsequently, we have developed an image subtraction and candidate
vetting pipeline with ~ 94% efficiency for transient detection. Processing the
data with this pipeline, we find several transients, but none that are
compatible with kilonova models. We present the details of our observations,
working of our pipeline, results from the search, and our interpretations of
the non-detections that will work as a pathfinder during the O4 run of LVK.
