I noticed some Slark interests on this board just before visiting Berkshire Record Office earlier this week. I was checking Easthampstead Parish Registers - christenings and came across these:
1802 - August 31 - 8th - William s/o John & Sarah Slark
1804 - Feb (I think, page was torn) Sarah d/o John & Sarah Slark
1803 - April 3 - William of Jonathan & Caroline Slark
1806 - March 30 - Sophia of Henry & Elizabeth Slark
Hope it helps