I'm terribly sorry you lost your little friend.
I don't want to upset you - but do watch your other chicken(s) as Marek's is extremely contagious. In fact, it can travel on the wind farther than most people would guess. The infinitely small bits of feather dander that we almost can't see carries the disease around. It can come on quickly, or it can grow slowly over a number of years and then suddenly show itself. So do watch your hens. I'm sorry.
I hope to heaven though that others on this list sit up and take notice that Marek's isn't just something that happens to big breeders. It isn't something that a backyard flock is at all immune to. Unless we ask the breeder of our birds to vaccinate them at birth they are NOT vaccinated. Adding insult to injury too many breeders simply SKIP vaccinating bantams at all. I've been nearly laughed at too many times for my views on the dangers of Marek's. Please, EVERYONE, only buy vaccinated stock. And if you hatch your own, you can buy small quantities of freeze dried tablets to create a vaccine you can give. It only costs dollars to buy it - not big money.
My sympathies. Please be a beacon of encouragement for all your fellow chicken keepers to vaccinate their birds.
*hugs*
Quoting another web forum about where to get Marek's freeze dried vaccine:
Clausing Company, Nicotee, FL 34268 (no street address) 941-or 843-993-2542. Ask for tablet marked in quarters. Vaccine is freeze dried, in a vial and refrigerated--keep unused part refrigerated. The vaccine and diluent is enough for 1000 birds, but you can use it in 4ths. Only good for an hour after mixing- $11 Postpaid (YEAR 2000 PRICING) One needle comes with the order, I ordered 3 extra needles for each hatch. --requires care--live vaccines are not to be played with -